LF · 2019
Mac Williamson
- Age
- 29
- B/T
- R/R
- Height
- 6' 4"
- Weight
- 237 lb
- Born
- July 15, 1990 in Jacksonville, FL, USA
- MLB debut
- September 23, 2015
- dbWAR
- -.8 5 season(s)
- PA
- 144
- AVG
- .156
- OBP
- .250
- SLG
- .258
- wRC+
- 40 100 = avg
Mac Williamson is a left fielder for the Seattle Mariners. In 2019 he hit 4 home runs and knocked in 17 RBIs, notching 20 hits across 144 plate appearances in 39 games. His batting average was .156, 38.1% lower than the league average of .252. He reached base at a .250 clip and slugged .258, for an OPS of .508, 33.0% lower than the league mark of .758 — the worst on his team, and 439th of 451 among MLB batters with 100+ plate appearances. He averaged 85.5 mph off the bat, hit 36.4% of balls in play at 95 mph or better, barrelled 3.9% of them and made contact on 66.0% of his swings. Adjusted for his ballpark and league, his 40 wRC+ puts his offence 60% below average. That comes to -0.8 dbWAR — -11.1 runs with the bat, -0.1 on the bases, -1.8 for the position he plays, against replacement level. It includes no fielding: defensive runs are proprietary and are not estimated here, so the figure credits playing a demanding position but not playing it well.
League context
Percentile among qualified batters, 2019.
How the WAR is built
Runs above replacement, 2019. These four terms sum to -8.2 runs, divided by runs-per-win to give WAR.
WAR by season
Batting
Standard and advanced, by season.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019 | 39 | 144 | 20 | 4 | 17 | 2 | 14 | 44 | .156 | .250 | .258 | .102 | .200 | 9.7% | 30.6% | .233 | -11.1 | 40 | -0.8 | |
| 2018 | 28 | 105 | 20 | 4 | 11 | 1 | 11 | 27 | .213 | .295 | .383 | .170 | .254 | 10.5% | 25.7% | .301 | -1.5 | 88 | 0.0 | |
| 2017 | 27 | 73 | 16 | 3 | 6 | 1 | 5 | 25 | .235 | .288 | .397 | .162 | .325 | 6.8% | 34.2% | .291 | -2.0 | 81 | -0.1 | |
| 2016 | 54 | 127 | 25 | 6 | 15 | 0 | 13 | 35 | .223 | .315 | .411 | .188 | .268 | 10.2% | 27.6% | .321 | -0.0 | 99 | 0.2 | |
| 2015 | 10 | 34 | 7 | 0 | 1 | 0 | 0 | 8 | .219 | .235 | .281 | .063 | .280 | 0.0% | 23.5% | .225 | -2.5 | 37 | -0.2 |
Platoon splits
How he hits left- and right-handed pitching.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHP | 32 | 30 | 4 | 0 | 2 | 13 | .133 | .188 | .133 | .153 | 40.6% |
| vs RHP | 112 | 98 | 16 | 4 | 12 | 31 | .163 | .268 | .296 | .256 | 27.7% |
Spray chart
Where every ball he put in play landed, 2019.
Loading 84 batted balls…
Contact quality
How hard and at what angle he hits it, over 77 tracked batted balls in 2019. Percentiles are against qualified batters.
- Barrel rate
- 3.9% 3 barrels
- Exit velocity
- 85.5 mph average
- Max exit velo
- 110.6 mph, hardest hit
- Hard hit
- 36.4% 95 mph or better
- Sweet spot
- 32.5% 8–32° launch
- Launch angle
- 8.8° average
A barrel is a batted ball whose exit velocity and launch angle have historically produced at least a .500 average and 1.500 slugging — 98 mph within 26–30°, widening to 8–50° by 116 mph. Reconstructed from Statcast's published anchor points, which reproduces them exactly; the interior is within a degree. Sweet spot (8–32°) is an exact definition.
Hot and cold zones
Batting average by pitch location, 2019.
Situational hitting
How Mac Williamson hits by base state, outs, score and late-game pressure — each read against his own season line.
| Situation | PA | AB | H | HR | RBI | BB | SO | AVG | OBP | SLG | wOBA |
|---|---|---|---|---|---|---|---|---|---|---|---|
| All situations | 144 | — | — | — | — | — | — | .156 | .250 | .258 | .233 |
| Bases empty | 79 | 70 | 8 | 1 | 1 | 9 | 23 | .114 | .215 | .157 | .183 |
| Runner on first | 28 | 24 | 4 | 1 | 2 | 4 | 11 | .167 | .286 | .292 | .265 |
| Runners on | 65 | 58 | 12 | 3 | 16 | 5 | 21 | .207 | .292 | .379 | .293 |
| RISP | 37 | 34 | 8 | 2 | 14 | 1 | 10 | .235 | .297 | .441 | .315 |
Runners on includes runners in scoring position, which is the convention every reference uses. Counted from play-by-play, 2019.
Head to head
Put Mac Williamson beside up to three others.
Similar players
Nearest 2019 seasons by discipline, contact, power and speed, on rate statistics rather than totals.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.