Trevor Williams

33-Year-Old PitcherSP

Washington Nationals

2025 Stats

W-L

3-5

ERA

5.69

WHIP

1.45

Rest-of-Season Projections

W-L

ERA

WHIP

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2025 Fantasy Outlook

Williams missed three-plus months of 2024 due to a right elbow flexor strain, but he was surprisingly dominant when healthy for the Nationals with a 2.03 ERA, 1.04 WHIP and 59:18 K:BB over 66.2 innings. His average fastball velocity of 88.6 mph was the lowest of his career, but he used the four-seam fastball less and relied more on his sweeper, which helped produce a career-high 22.7 percent strikeout rate. He performed better than expected with a 3.82 xFIP and 3.13 xERA, so some regression is likely even if he pitches similarly in 2025, especially given the small sample size and waning velocity. Williams doesn't offer much strikeout upside and doesn't have a consistent history as a starter, so he seems unlikely to replicate that effectiveness in 2025 as a 33-year-old. He re-signed with Washington on a two-year contract this winter and is a likely bet to begin the season in the rotation, though he could also revert to more of a swingman role, in which he's had past success. Read Past Outlooks

RANKS

Rest of Season

From Preseason

#428

ADP

League Majors

Bats R

Throws R

40 Man Yes

Height 6'3"

Weight 238

DOB 4/25/1992

Born San Diego, CA

College Arizona State

Drafted 2nd Rd 2013 MIA

Shuts down Mariners in victory

PWashington Nationals

May 28, 2025

Williams (3-5) earned the win over Seattle on Wednesday, tossing six scoreless innings during which he allowed three hits and struck out two batters without issuing any walks.

ANALYSIS
Williams was masterful despite notching only five whiffs and two punchouts, as he allowed just three baserunners, two of which reached in the third inning. The right-hander probably could have gone deeper -- he tossed a mere 77 pitches (54 strikes) -- but manager Dave Martinez chose to go to the bullpen after six innings with the Nationals comfortably ahead by six runs. This was the first quality start of the season for Williams, who has had a rough campaign with a 5.69 ERA and 1.45 WHIP through 55.1 frames.

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Pitching Stats

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2025

2024

2023

2022

2021

2020

2019

2018

2017

2025 MLB Game Log

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2024 MLB Game Log

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2023 MLB Game Log

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2022 MLB Game Log

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2021 MLB Game Log

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2020 MLB Game Log

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2019 MLB Game Log

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2018 MLB Game Log

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2017 MLB Game Log

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Minor League Game Log

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Pitching Appearances Breakdown

Average Pitch Count

Last 10 Games

Last 5 Games

How many pitches does Trevor Williams 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 Trevor Williams 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

-13%

BAA vs RHP

2025

-42%

BAA vs RHP

2024

-12%

BAA vs RHP

2023

Even Split

	BAA	Batters	K	BB	H	2B	3B	HR
Since 2023vs Left	.297	633	96	51	169	27	5	21
Since 2023vs Right	.258	530	117	35	125	19	0	23
2025vs Left	.354	144	19	10	46	3	2	6
2025vs Right	.204	100	24	5	19	3	0	1
2024vs Left	.228	136	31	11	28	7	1	0
2024vs Right	.200	124	28	7	23	1	0	3
2023vs Left	.301	353	46	30	95	17	2	15
2023vs Right	.300	306	65	23	83	15	0	19
More Splits→	View More Split Stats

Home/Away Pitching Splits

Since 2023

-8%

ERA on Road

2025

-22%

ERA on Road

2024

-44%

ERA at Home

2023

-4%

ERA on Road

	ERA	WHIP	IP	W	L	SV	K/9	BB/9	HR/9
Since 2023Home	4.90	1.34	121.1	7	7	0	7.6	2.9	1.6
Since 2023Away	4.53	1.50	145.0	8	9	0	6.8	2.9	1.4
2025Home	6.48	1.44	25.0	1	2	0	8.3	3.2	1.4
2025Away	5.04	1.45	30.1	2	3	0	5.9	1.8	0.9
2024Home	1.37	0.76	26.1	3	0	0	10.3	1.4	0.3
2024Away	2.45	1.21	40.1	3	1	0	6.5	3.1	0.4
2023Home	5.66	1.53	70.0	3	5	0	6.4	3.3	2.1
2023Away	5.45	1.67	74.1	3	5	0	7.4	3.3	2.2
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Stat Review

How does Trevor Williams compare to other starting pitchers?

This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 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 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.

K/BB

2.87

K/9

7.0

BB/9

2.4

HR/9

1.1

Fastball

87.4 mph

ERA

5.69

WHIP

1.45

BABIP

.339

GB/FB

1.11

Left On Base

62.7%

Exit Velocity

80.2 mph

Barrels/BBE

3.3%

Spin Rate

2149 rpm

Balls Hit 95+ MPH

24.9%

Swinging Strike

8.9%

Advanced Pitching Stats

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Defensive Stats

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Stats Vs Today's Lineup

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Past Fantasy Outlooks

2024

2023

2021

2020

2019

2018

2017

2016

2015

Williams made 30 starts for the Nationals last season, which was just the second time in the 31-year-old's career that he's reached that plateau. It looked like the right-hander was going to be at least passable for the first two months of the season when he held a 3.93 ERA, but a 5.15 FIP was the better indicator of his performance and, sure enough, his ERA climbed to 6.55 the rest of the way (which included a 12.51 ERA in September). Williams is owed $7 million in 2024 and the Nats aren't exactly teeming with starting pitcher options, so he'll probably begin the year in the rotation. However, the odds that he'll end the year still in the rotation wouldn't appear high.

Williams spent the past two years as a swingman for the Cubs and Mets, and he was a reliable option with a 3.21 ERA, 1.23 WHIP and 84:23 K:BB across 89.2 innings during 2022. The right-hander landed a two-year deal with the Nationals and is poised to move back into the rotation, where he spent the first four seasons of his big-league career. Williams' 22.4 percent strikeout rate over the past two years is solid, albeit unexciting, and it's paired with a 6.9 percent walk rate. He'll turn 31 years old in April and is likely to maintain his low-90s fastball, and a return to the rotation shouldn't affect his arsenal too much given he doesn't heavily rely on his velocity. Williams' fantasy utility is limited, but he could have some value as a depth starter if he's able to replicate his 2022 numbers in a larger sample size.

Williams spent the year in the Pirates' rotation eating innings, albeit in an unappetizing manner. He was especially burned by the long ball, surrendering 15 homers in 55.1 innings. The righty tried adjusting his arsenal, throwing fewer 91-mph fastballs while upping his slider, curveball and changeup usage a bit. The results were uninspiring as in addition to gopheritis, Williams' 11.1 K-BB% was 21st lowest among pitchers with at least 50 innings pitched. Pittsburgh released Williams, and at press time, he's still looking for a new home. PNC Park significantly suppresses homers, so Williams will be hard-pressed to get that issue under control elsewhere. With volatile ratios and a low strikeout rate, Williams has minimal fantasy appeal. In today's landscape, the roster spot is better utilized on a dominant reliever.

Williams showed flashes of brilliance in 2018, but failed to make much of a fantasy impact in 2019, finishing the year with a 5.38 ERA and 1.41 WHIP around injuries. His struggles can be attributed in part to the juiced ball (27 home runs allowed, up from 15 in 2018). The right-hander found success in 2018 by limiting the amount of hard hits allowed, and even with the homer issues last year he was still better than average in terms of average exit velocity and hard-hit rate. His fastball velocity ticked up to 91.3 mph in 2019, which helped bring his swinging-strike rate up to 10.4%. With the MLB run environment impossible to predict, Williams is merely on the margins of fantasy relevance; his windows of efficiency proved unsustainable in a juiced-ball year. Williams will look to right the ship and his home park should help in that regard, but he's barely even in the glob until further notice.

Williams provided the most confounding success story of the 2018 season. During a nine-start run from July to early September (54.2 innings), Williams posted an incredible 0.66 ERA and 1.06 WHIP. He achieved those marks despite just a 34:17 K:BB over that stretch. It was a microcosm of his season as a whole; while Williams obviously wasn't that successful over the course of the full year, he still finished with great ratios despite an utter lack of dominance. Williams barely cracked 90 mph on average with his fastball, which he threw 70% of the time, and induced swinging strikes at a career-low 7.9% clip. So how on Earth did he do it? And is it sustainable? In short: by inducing a lot of manageable, playable contact, and no. His opponents' 85.6 mph average exit velocity was among the lowest in baseball, but without the other numbers in the underlying profile, there's simply not much to get excited about. Don't pay for last year's numbers.

Williams settled in as a back-end starter for the Pirates last season, providing an innings-eating option every fifth day. For those who were careful to use him as a home streamer, Williams returned plenty of value with good ratios at PNC Park (3.45 ERA, 1.17 WHIP) despite a very limited ability to induce whiffs. Away from Pittsburgh, his ERA was more than a run-and-a-half higher (4.96), but it's interesting to note that his ability to keep the ball in the park did not change much in more hitter-friendly parks. Looking forward, Williams should have an inside track to begin the year back in the Bucs' rotation. In order to stay there and to remain effective, he'll need to improve his changeup, as opposing hitters hit .328 with a .547 slugging percentage against that offering last season, and ideally, improve his walk rate as well, as there isn't much in his current arsenal that suggests a spike in strikeouts is on the horizon barring the addition of a new pitch or an increase in velocity.

Williams' postgame embrace with his dad following his first appearance (and win) was one of the more emotional scenes in baseball last year. The 25-year-old started in 19 of his 20 Triple-A games, going 9-6 with a 2.53 ERA and 1.20 WHIP in 110.1 innings. A 74:30 K:BB serves as a reminder he'll probably never be a big strikeout guy. For the Pirates, Williams fell off after his debut. He gave up 11 earned runs, 16 hits and four walks in 9.2 innings, striking out four. Based off his strong Triple-A showing and the fact he served as informal trade compensation when Miami hired away pitching guru Jim Benedict from Pittsburgh, Williams will likely receive ample opportunities to prove his worth as a serviceable innings-eater for the Bucs.

As a sinkerballer with the body to eat innings, there is more pitchability than stuff in Williams’ profile, but he still has a good enough repertoire to succeed at the back of a big league rotation. The 23-year-old righty has a solid four-pitch mix but has yet to showcase above average command in the upper levels of the minors. Williams posted a 4.00 ERA, 1.38 WHIP, and a 88:36 K:BB over 117 innings at Double-A Jacksonville before earning a late-season promotion to Triple-A New Orleans where he made three solid starts. He was traded to the Pirates in the offseason -- a move that might lessen his chances of joining a big league rotation this summer, given the disparity of pitching depth between the two organizations. Look for the Pirates to use Williams as rotation depth in the second half of 2016.

A second-round selection in 2013, Williams totaled 144 innings pitched across two minor league levels, reaching Double-A for the final three starts of the season. It was another positive step for Williams, who does not come as highly regarded as many of the other prospect arms in the Marlins' system, as he continues put the results on tape. The right hander went 8-7 with a 3.13 ERA and 1.35 WHIP over 26 starts during the 2014 season, his first full season of professional ball. Though Williams is fairly hittable and has posted mediocre strikeout totals so far, he shows solid command and consistent effort. Williams should slot into the rotation at Double-A Jacksonville out of spring training as he continues to progress up the ladder.

More Fantasy News

Yields five runs Thursday

PWashington Nationals

May 22, 2025

Williams allowed five runs on four hits and three walks while striking out three over 3.2 innings in a no-decision versus Atlanta on Thursday.