Sean Manaea

Sean Manaea

33-Year-Old PitcherRP
New York Mets
2025 Fantasy Outlook
Manaea was good for his first 20 starts last season, putting up a 3.74 ERA, 1.25 WHIP and 101:45 K:BB over 106 innings. Then, after watching a Chris Sale start and deciding he'd try to emulate Sale's lower arm slot, Manaea really took off over his final 12 outings, collecting a 3.09 ERA, 0.85 WHIP and 83:18 K:BB across 75.2 frames. The new arm slot allowed Manaea's sinker to play better at the top of the zone, and he also found the strike zone more consistently, cutting his walk rate from 10.1 percent to 6.2 percent. A pitcher elevating his ceiling rarely happens in their 30s, but when it does it's usually because of a tangible change like Manaea made. It will cost fantasy managers more in 2025 to find out whether he can carry over his late-season success. There's also no change of scenery to consider since he re-signed with the Mets on a three-year, $75 million deal. Read Past Outlooks
RANKS
Rest of Season From Preseason
#228
ADP
Signed a three-year, $75 million contract with the Mets in December of 2024.
Loses in season debut
PNew York Mets
July 13, 2025
Manaea (0-1) allowed a run on five hits over 3.1 innings of relief Sunday. He struck out seven and took a loss against the Royals.
Analysis
Manaea took over in the sixth inning after Clay Holmes tossed five frames. Manaea showed no signs of rust, racking up 13 whiffs, including 10 with his fastball that averaged 93 mph. He threw 44 of 63 pitches for strikes and didn't face much trouble until allowing a walk-off single to Nick Loftin in the ninth inning. Manaea is expected to move into the rotation after the All-Star break.
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Pitching Stats
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2025 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
65
Last 10 Games
65
Last 5 Games
65
How many pitches does Sean Manaea generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Sean Manaea generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
 
 
-6%
BAA vs RHP
2025
 
 
-45%
BAA vs RHP
2024
 
 
-23%
BAA vs RHP
2023
 
 
-21%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .227 334 97 25 69 12 1 9
Since 2023vs Right .213 918 222 80 174 34 4 26
2025vs Left .500 4 1 0 2 0 0 0
2025vs Right .273 11 6 0 3 0 0 0
2024vs Left .248 158 47 11 36 5 0 7
2024vs Right .190 580 137 52 98 22 0 14
2023vs Left .200 172 49 14 31 7 1 2
2023vs Right .253 327 79 28 73 12 4 12
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2023
 
 
-10%
ERA at Home
2025
 
 
-100%
ERA at Home
2024
 
 
-15%
ERA on Road
2023
 
 
-36%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 3.64 1.01 151.0 8 8 1 10.1 2.6 1.3
Since 2023Away 4.04 1.29 151.2 11 5 0 8.8 3.7 0.8
2025Home 0 0 0 0 0 0 0 0 0
2025Away 2.70 1.50 3.1 0 1 0 18.9 0.0 0.0
2024Home 3.75 0.98 93.2 6 3 0 10.0 2.5 1.3
2024Away 3.17 1.19 88.0 6 3 0 8.2 3.8 0.7
2023Home 3.45 1.06 57.1 2 5 1 10.4 2.7 1.3
2023Away 5.37 1.41 60.1 5 1 0 9.2 3.7 0.9
More Splits View More Split Stats
Stat Review
How does Sean Manaea compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
0.00
 
K/9
18.9
 
BB/9
0.0
 
HR/9
0.0
 
Fastball
93.0 mph
 
ERA
2.70
 
WHIP
1.50
 
BABIP
.676
 
GB/FB
1.00
 
Left On Base
80.0%
 
Exit Velocity
0.0 mph
 
Barrels/BBE
0.0%
 
Spin Rate
0 rpm
 
Balls Hit 95+ MPH
0.0%
 
Swinging Strike
16.9%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Sean Manaea See More
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Past Fantasy Outlooks
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
A trip to Driveline last offseason helped Manaea unlock more velocity, with the 93.6 mph he averaged with his four-seamer in 2023 representing more than a two-mph jump from 2022. He also had a 25.7 percent strikeout rate which was just a hair off his career high. Manaea's bottom-line results were uneven, though, due in part to a walk rate that climbed for a third straight year to a career-worst 8.4 percent. The left-hander also never seemed to settle into his hybrid role with the Giants, as he was used as a starter, bulk reliever and short reliever at various points. Manaea did finish strong after being used as a traditional starter in his final four appearances, which might have convinced him to exercise the opt-out clause in his contract. There's a path to mixed-league relevancy if Manaea lands in a good situation, particularly if his velocity gains hold. That said, Manaea has rarely been a consistent fantasy option in his career.
The Padres acquired Manaea from the A's after the end of the lockout in March 2022, but he delivered a disappointing season with a career-worst 4.96 ERA and was briefly dropped from the rotation in September. He gave up 29 home runs with a 14.9 percent HR/FB and also saw his groundball rate dip below 40 percent for the first time in his big-league career. Manaea got a two-year, $25 million deal with the Giants, which is a good landing spot and a sizable enough contract for us to feel confident in his role. Oracle Park is one of the five best parks at suppressing home runs, so that could make Manaea a strong home-streaming option. His changeup and slider each showed promising characteristics, so if he can dial back his fastball usage (61% last season), he could have a nice rebound in 2023.
One can take away many positives and negatives when examining Manaea's 2021 campaign. While logging a career-high 179.1 innings, the southpaw conceded a career-worst 1.25 HR/9 despite seeing his K% shoot up to 25.7%. Even though he ditched his four-seamer entirely in favor of a sinker, Manaea's average fastball velocity rose nearly two mph to 92.2 while his groundball rate dropped to 42.0%. His 3.65 FIP shined his campaign in a better light than his 3.91 ERA, in large part because of the opposition hitting .318 on balls in play against him. The lefty's offspeed deliveries proved to be effective, with hitters slashing just .213 against his slider and .239 against his changeup. Assuming he's able to stay healthy, Manaea shouldn't have a problem eclipsing 150 innings during his age-30 season, but it's hard to envision him establishing more than the middle-of-the-rotation presence that he's held for the vast majority of his career.
Through four starts last season, Manaea was sitting on a 9.00 ERA and 1.87 WHIP. However, a .462 BABIP, 46.2 LOB% and 4.19 xFIP in those 15 frames begged for patience. Sure enough, the lefty spun a 2.95 ERA and 0.95 WHIP the rest of the way, with a 3.62 xFIP over 39 innings during that stretch. Manaea's career strikeout rate is a pedestrian 19.7%, capping his ceiling and exposing him to the whims of variance as we saw last season. A 6.1 BB% and 44.6% groundball mark help keep his ratios in check. Manaea's bread and butter is a sinker, but it only generates a 7% swinging-strike rate while his lesser-used changeup, curveball and slider all generate double-digit rates. A tweak in Manaea's repertoire could manifest in more punchouts without hurting other areas. After his disappointing 2020, most are off Manaea, creating a potential buying opportunity in fantasy drafts.
Manaea's 2018 was truncated by shoulder surgery, which was initially expected to keep him out for all of 2019. However, rehab proceeded well and the lefty returned when rosters expanded. When he finally made it to the hill, the Athletics didn't baby him as Manaea started five games, throwing 29.2 innings. He responded with a 1.21 ERA and 0.78 WHIP, earning the start in the AL Wild Card Game. Ignore the actual results; the important thing is Manaea was able to average nearly six innings a start, boding well for his fantasy potential in 2020. The southpaw's velocity and spin were down a tick, but that's to be expected after such a long layoff. Not to mention, he relies more on command and control and doesn't feature a curve while only throwing sliders about 20% of the time. Temper expectations to around 150 innings, but there's little reason to think Manaea can't pick up where he left off in 2018.
Manaea's 2019 season is very much in doubt after he had major shoulder surgery in late September. He has seen his average fastball velocity drop off nearly four miles per hour over the past three seasons and has had noticeable velocity dips in each of the past two second halves. He held batters to a .212/.264/.376 line before the All-Star break this past season, even no-hitting the eventual World Series champs, but 18 home runs allowed in 123 innings pushed his ERA up to 3.42 when it was all said and done. He allowed fewer homers (4) in the 37 innings he pitched after the break, but his opponents' slash line jumped to .286/.325/.414. If your league allows you to draft injured players and stash, Manaea is in the mix as he has shown signs of being worth it to do that. Just understand that you may not get a single pitch from him this year and we will not know more about his shoulder until late February.
Manaea came into 2017 wanting to tighten up his slider so it was not as loopy and overexposed to righties. He did use the pitch more in 2017, and early on it helped. Manaea hit the All-Star break with a 3.76 ERA, 1.21 WHIP and 24.0 percent strikeout rate. He limped to the finish line last season, posting a 5.23 ERA, 1.67 WHIP and 15.4 percent strikeout rate. That drop in strikeouts is alarming from season-to-season let alone within a single season. He did not lose too much velocity off his fastball (92.1 to 91.7), but he was quite hittable over the summer including an outing against Baltimore where he never got a second out while allowing six earned runs. When Manaea is dealing, it is fun to watch, but the lack of consistency right now dampens the appeal of his upside.
Success is all about making adjustments. Manaea built on his flawed first half (5.24 ERA in 12 starts) to become a stud during the second half of the season (2.67 ERA in 13 games, 12 starts). He improved across the board, and Manaea saved his best work for the final month of the season: four starts, 24 innings, a 1.13 ERA and 20:5 K:BB. The A's were careful with his workload: Manaea threw more than 100 pitches in just five of his 24 starts, and he was capped at 106 pitches in a game. His best offering in the first half was his changeup, which he threw just 23.1 percent of the time, but he upped the usage to 31.5 percent in the second half and thrived. The slider also showed inseason improvement, and his ability to mix the secondary offerings to batters on both sides of the plate will be a key aspect of his development. This combination of improvement and upside makes him an intriguing fantasy sleeper.
Manaea was the top chip acquired by the A's in the trade deadline deal that sent Ben Zobrist to Kansas City. The lefty will be 24 in February and was the 34th overall pick in the 2013 draft. He impressed right away after the trade, putting up a 1.90 with a 10.76 K/9 over seven starts at Double-A Midland. After dominating in the 2012 Cape Cod League, there was some talk before the 2013 draft that Manaea had a chance to go No. 1 overall, but injuries and poor performance caused him to slide to 34th. Manaea sits in the low 90's with his fastball and also features a plus slider that all comes with a deceptive delivery. The A's are very excited about Manaea and Billy Beane commented that Manaea is the type of guy he did not think would be obtainable at the deadline. Various minor injuries have slowed his momentum so far, but if he can stay healthy and pick up where he left off at the end of 2015, Manaea has a chance to join the A's before the 2016 season is complete.
Manaea put together a solid 25 starts in his first year at High-A Wilmington, posting a 3.11 ERA (supported by a 2.79 FIP) and a K/9 of 10.8. Some questions about his health caused his stock to slip a bit in the 2013 first-year player draft, but he was able to return from hip surgery and toss 121.2 innings during his age-22 season. The 6-foot-5 southpaw mixes a mid-90s fastball with an above-average slider, and also has a changeup in his arsenal. That combination of weapons prevented left-handed hitters in the Carolina League from homering off him in 2014, as Manaea was able to limit them to a .211 batting average. The sky is the limit for Manaea, who certainly has potential to rise quickly though the minor league ranks in the coming season. He'll look to build off the momentum generated from a strong second half, a period in which he limited opposing batters to a .180 average and posted a 1.01 WHIP over 73.1 innings.
Manaea was the Royals's second pick (34th overall) in the 2013 draft out of Indiana State University. Many experts originally suggested Manaea could have been a No. 1 overall pick, but the immediate need for hip surgery, a problem that developed from overcompensating for an ankle injury during his delivery, saw him drop down many teams' draft boards. The 6-foot-5, 235 pound lefty has a solid three-pitch arsenal with a fastball clocked as high as 96 mph, and after successful surgery and rehab, is expected to be ready for spring training. He is expected to open the year either in Low-A Lexington or High-A Wilmington. Depending on his progress, he could be on the fast-track towards the major leagues, but not likely until 2015 or 2016. Dynasty league owners will want to keep him on their radar as he does project to be a solid middle-of-the-rotation starter down the road.
More Fantasy News
Activated for season debut
PNew York Mets
July 13, 2025
The Mets reinstated Manaea (elbow/oblique) from the 60-day injured list, and he's expected to work as a bulk reliever Sunday against the Royals.
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Tosses 73 pitches in rehab start
PNew York Mets
Elbow
July 9, 2025
Manaea (elbow/oblique) struck out five and allowed three earned runs on four hits and one walk over 3.2 innings in his rehab start Tuesday with Triple-A Syracuse.
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Could work in bulk relief Sunday
PNew York Mets
Elbow
July 8, 2025
Manaea (elbow/oblique) will likely piggyback Clay Holmes during Sunday's game against the Royals, provided that all goes well in Manaea's final rehab start Tuesday with Double-A Binghamton, Mike Puma of the New York Post reports.
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Making another rehab start
PNew York Mets
Elbow
July 3, 2025
Mets manager Carlos Mendoza said Thursday that Manaea (elbow/oblique) will make one more rehab start Tuesday, Manny Gomez of NJ.com reports.
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Makes 60-pitch rehab start
PNew York Mets
Elbow
July 3, 2025
Manaea (elbow/oblique) allowed three runs (two earned) on six hits and one walk while striking out three batters over three innings in his rehab start Wednesday with Double-A Binghamton.
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Latest Fantasy Rumors
Contract likely to top $75 million
PFree Agent
December 11, 2024
Manaea's contract is expected to top the three-year, $75 million deal signed by Nathan Eovaldi, Jon Morosi of MLB Network reports.
Analysis
Manaea's track record has much more inconsistency than Eovaldi's, but he's also two years younger and thrived down the stretch for the Mets in 2024 after lowering his arm slot. The left-hander rejected a qualifying offer from the Mets, so the club that signs him must forfeit a trade pick in addition to dishing out a hefty sum of money.
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