Zack Gelof

Zack Gelof

25-Year-Old Second Baseman2B
Sacramento Athletics
2025 Fantasy Outlook
After breaking out to the tune of 14 homers and 14 steals in just 69 games as a rookie, Gelof endured the dreaded sophomore slump last season. He struggled mightily with strikeouts, fanning an AL-worst 188 times, which resulted in a 56-point drop in batting average to .211. Gelof showed signs of recovery in June only to post OPS marks below .700 in each of the final three months. The Athletics had nothing to lose and kept Gelof on the field at second base, affording him the opportunity to rack up 17 homers and 25 steals across 547 plate appearances. Gelof and the rest of the A's will be playing their home games at Sutter Health Park in West Sacramento in 2025 -- home of the Triple-A Sacramento River Cats of the Pacific Coast League -- which would seem to bode well for the offense. The pressure will be on for Gelof to bounce back and prove he should be considered part of the organization's long-term future. Read Past Outlooks
RANKS
Rest of Season From Preseason
#242
ADP
Signed a one-year contract with the Athletics in March of 2025.
Supplies RBI in season debut
2BSacramento Athletics
July 4, 2025
Gelof (ribs) went 0-for-3 with one RBI and one run scored in Friday's 11-2 win over the Giants.
Analysis
Gelof initially had a hamate fracture and then sustained a rib injury in May while on his first rehab assignment. The second baseman played the full game Friday, and he'll likely take over as the Athletics' starter at the keystone. He'll go relatively unchallenged for playing time while Luis Urias (hamstring) is on the injured list. Gelof slashed a paltry .211/.270/.362 in 2024 after batting .267 with an .841 OPS in 69 games as a rookie in 2023. Keep an eye on him to see if he can overcome missing half of a season to rebound from last year's sophomore slump.
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Batting Stats
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2025 MLB Game Log
2025
2024
2023
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2024 MLB Game Log
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2023 MLB Game Log
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Minor League Game Log
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Batting Order Slot Breakdown
vs Right-Handed Pitchers
vs RHP
#1
#2
#3
#4
#5
#6
#7
#8
#9
1
vs Left-Handed Pitchers
vs LHP
#1
#2
#3
#4
#5
#6
#7
#8
#9
Left/Right Batting Splits
Since 2023
 
 
+60%
OPS vs RHP
2025
No Stats
2024
 
 
+41%
OPS vs RHP
2023
 
 
+99%
OPS vs RHP
OPS PA R HR RBI SB AVG OBP SLG
Since 2023vs Left .481 205 19 3 8 8 .149 .244 .238
Since 2023vs Right .771 646 82 28 74 31 .255 .308 .463
2025vs Left 0 0 0 0 0 0 0 0 0
2025vs Right .000 4 1 0 1 0 .000 .000 .000
2024vs Left .479 125 13 2 6 5 .138 .240 .239
2024vs Right .676 422 47 15 43 20 .232 .279 .397
2023vs Left .486 80 6 1 2 3 .167 .250 .236
2023vs Right .969 220 34 13 30 11 .303 .368 .601
More Splits View More Split Stats
Minor League Splits View Minor League Split Stats
Home/Away Batting Splits
Since 2023
 
 
+15%
OPS on Road
2025
No Stats
2024
 
 
+35%
OPS on Road
2023
 
 
+10%
OPS at Home
OPS PA R HR RBI SB AVG OBP SLG
Since 2023Home .654 425 48 11 32 23 .224 .293 .361
Since 2023Away .751 426 53 20 50 16 .236 .292 .459
2025Home .000 4 1 0 1 0 .000 .000 .000
2025Away 0 0 0 0 0 0 0 0 0
2024Home .536 269 28 6 18 14 .186 .251 .285
2024Away .724 278 32 11 31 11 .235 .289 .435
2023Home .879 152 19 5 13 9 .296 .375 .504
2023Away .801 148 21 9 19 5 .237 .297 .504
More Splits View More Split Stats
Stat Review
How does Zack Gelof compare to other hitters?
This section compares his stats with all batting seasons from the previous three seasons (minimum 400 plate appearances)*. 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 and Barrels/PA % are benchmarked against 2019 data (min 400 PA) and Hard Hit Rate is benchmarked against last season's data (min 400 PA). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • BB/K
    Walk to strikeout ratio
  • BB Rate
    The percentage of plate appearances resulting in a walk.
  • K Rate
    The percentage of plate appearances resulting in a strikeout.
  • BABIP
    Batting average on balls in play. Measures how many of a batter’s balls in play go for hits.
  • ISO
    Isolated Power. Slugging percentage minus batting average. A computation used to measure a batter's raw power.
  • AVG
    Batting average. Hits divided by at bats.
  • OBP
    On Base Percentage. A measure of how often a batters reaches base. Roughly equal to number of times on base divided by plate appearances.
  • SLG
    Slugging Percentage. A measure of the batting productivity of a hitter. It is calculated as total bases divided by at bats.
  • OPS
    On base plus slugging. THe sum of a batter's on-base percentage and slugging percentage.
  • wOBA
    Weighted on-base average. Measures a player's overall offensive contributions per plate appearance. wOBA combines all the different aspects of hitting into one metric, weighting each of them in proportion to their actual run value.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Hard Hit Rate
    A measure of contact quality from Sports Info Solutions. This stat explains what percentage of batted balls were hit hard vs. medium or soft.
  • Barrels/PA
    The percentage of plate appearances where a batter had a batted ball classified as 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.
  • Expected BA
    Expected Batting Average.
  • Expected SLG
    Expected Slugging Percentage.
  • Sprint Speed
    The speed of a runner from home to first, in feet per second.
  • Ground Ball %
    The percentage of balls put in play that are on the ground.
  • Line Drive %
    The percentage of balls put in play that are line drives.
  • Fly Ball %
    The percentage of balls put in play that are fly balls.
BB/K
0.00
 
BB Rate
0.0%
 
K Rate
25.0%
 
BABIP
.000
 
ISO
.000
 
AVG
.000
 
OBP
.000
 
SLG
.000
 
OPS
.000
 
wOBA
.000
 
Exit Velocity
87.3 mph
 
Hard Hit Rate
33.3%
 
Barrels/PA
0.0%
 
Expected BA
.025
 
Expected SLG
.030
 
Sprint Speed
0.0 ft/sec
 
Ground Ball %
33.3%
 
Line Drive %
0.0%
 
Fly Ball %
66.7%
 
Prospect Rankings History
Advanced Batting Stats
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Additional Stats
Games By Position
Defensive Stats
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Batted Ball Stats
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Stats Vs Upcoming Pitchers
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Recent RotoWire Articles Featuring Zack Gelof See More
Recent RotoWire Articles Featuring Zack Gelof See More
Past Fantasy Outlooks
2024
2023
Oakland was eliminated from the postseason on the second day of the 2023 season, so it remains a mystery why they let Gelof stay in the minors as long as he did rather than try to push for a prospect promotion incentive pick. Gelof began the season with 12 homers, 20 steals, and a .304/.401/.529 line in Sacramento over 69 games before coming to Oakland and hitting 14 more homers with 14 steals and a .267/.337/.504 line in the same amount of games. All in all, Gelof finished with 26 homers, 100 runs, 76 RBI, and 34 steals in 138 games. All that from someone whose ADP was in the 700's last winter. Strikeouts have been an issue as he has rapidly ascended in the system since coming out of the University of Virginia which will limit the ceiling of his batting average, but he should volume plenty in the other categories as an everyday major leaguer in 2024. His market price year over year has improved more than any other hitter.
In many organizations, Gelof might have a hard time breaking through for MLB playing time in 2023, but that shouldn't be the case in Oakland. He spent more time at second base than third base in 2022 and projects as the everyday second baseman as early as this summer, depending on how he handles a return to Triple-A. Gelof's 68.9 Contact% and 27.5 K% in the upper levels, primarily Double-A, portend initial struggles against big-league pitching. There is a slight chance Gelof could develop an above-average hit tool with plus power, but it's probably more likely he has an average hit tool with above-average power. That would equate to a useful middle infielder in fantasy, especially since Gelof is likely to hit in the middle of the lineup, but there's not a lot of upside here, given his future home park and lineup.
More Fantasy News
Activated from IL
2BSacramento Athletics
July 4, 2025
The Athletics reinstated Gelof (ribs) from the injured list Friday.
Analysis
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Closing in on season debut
2BSacramento Athletics
Ribs
July 2, 2025
Gelof (ribs) is likely to be activated from the 60-day injured list sometime during this weekend's series versus the Giants, Martin Gallegos of MLB.com reports.
Analysis
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Ramping up rehab workload
2BSacramento Athletics
Ribs
June 30, 2025
Athletics manager Mark Kotsay said Monday that Gelof (ribs) is slated to play full nine-inning games on consecutive days this week during his rehab assignment at Triple-A Las Vegas, Martin Gallegos of MLB.com reports.
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Looks set to extend rehab
2BSacramento Athletics
Ribs
June 25, 2025
Gelof (ribs) is expected to continue his rehab assignment at Triple-A Las Vegas for at least another week, Martin Gallegos of MLB.com reports.
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Set to start rehab assignment
2BSacramento Athletics
Ribs
June 16, 2025
Gelof (ribs) will begin a minor-league rehab assignment with Triple-A Las Vegas on Tuesday, Martin Gallegos of MLB.com reports.
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Latest Fantasy Rumors
No timeline for return
2BSacramento Athletics
May 6, 2025
Gelof was pulled back from his minor-league rehab assignment due to a rib injury and doesn't have a timetable for return, according to Martin Gallegos of MLB.com.
Analysis
The second baseman sustained a stress reaction in his ribs and has been shut down from swinging a bat, but the most concerning aspect of the situation is this is a completely different injury from the wrist injury that sidelined Gelof for the first month of the season. That was the result of being hit by a pitch during spring training, which led to a hamate fracture in his right wrist that shelved him for around four weeks. This latest setback suggests Gelof doesn't have a clear timetable for a return to action.
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