← BackGavin Williams
CLE · RHP · 2026
173.7 IP · 739 BF · 2,960 pitches · 2026 season
HIGH Descriptive — not a forecast
112
Stuff+
92th percentile
107
ABStuff+
95th percentile
108
Pitching+
82th percentile
33.0%
K%
94th percentile
8.3%
BB%
59th percentile
4.04
FIP
75th percentile
Grades describe this season's stuff and run prevention. They are not forecasts: on clean season pairs the model has not beaten naive persistence (RESULTS-MLB §13), so nothing here projects next season.
Percentile rankings
vs 2026 graded MLB pitchers · 173.7 IP · 739 BF · 2,960 pitches · 2026 season
Stuff
Stuff+112
92th percentile
ABStuff+107
95th percentile
Whiff%30.5%
91th percentile
CSW%38.5%
91th percentile
Results
Pitching+108
82th percentile
RV/100+0.34
69th percentile
FIP4.04
75th percentile
RA/94.04
58th percentile
GB%44.7%
64th percentile
Command
K%33.0%
94th percentile
BB%8.3%
59th percentile
K-BB%24.8%
94th percentile
Velo90.9
65th percentile
How to read these
Each row is his rank, 1 to 99, among all graded MLB pitchers this season; the tick is the median. Green is good for him, red bad, whatever the stat's direction (a low FIP ranks high). Grey circles are descriptive rates with no good direction, and n= in place of a rank means too few events to rank. Grades are descriptive, not forecasts.
Percentile rankings
Raw plate discipline · vs 2026 graded MLB pitchers · 173.7 IP · 739 BF · 2,960 pitches · 2026 season
Swing & miss
Z-Whf%18.1%
82th percentile
O-Whf%52.9%
91th percentile
Chase%33.6%
81th percentile
Z-Con%81.9%
82th percentile
O-Con%47.1%
95th percentile
SwStr%32.2%
93th percentile
PutAwy%23.0%
90th percentile
Approach
Zone%48.2%
60th percentile
Z-Swg%65.6%
41th percentile, descriptive, no good or bad direction
Swing%49.0%
68th percentile
CS%20.6%
56th percentile
F-Str%51.8%
65th percentile
How to read these
Raw rates with this season's descriptive ranks. Sample-adjusted (shrunk) rankings are not shown yet: the reliability constants behind them were measured on college data and are being re-measured on MLB. Until then a small sample here is a small sample — hover the leaderboard column for its event count.
ArsenalKey columns; every column is on the Arsenal tab
Movement Profile
SW-1.4/-2.4FF-1.2/-2.5SI+0.4/-0.5CB-6.3/+3.6CB-6.3/+3.6CT-1.6/-3.6ring = slot expectation ±1σ/2σ · HB mirrored for LHP · descriptive
Release Traits
Height: 5.92 ft (±0.17)
Side: -2.75 ft (±0.17)
Extension: 6.95 ft
Season means; the ± is the SD across his pitches. Per-pitch release plots land in a later wave.
Batted Ball Against
Pitch
N_BIP
GB%
FB%
LD%
PU%
Avg EV
Avg LA
HrdHit%
FF
102
38.2
32.4
18.6
0.0
81.8
32.0
43.1
SW
96
39.6
24.0
28.1
0.0
79.7
8.2
32.3
SI
88
45.5
25.0
26.1
0.0
88.1
18.6
62.5
CB
80
60.0
18.8
16.2
0.0
84.7
-3.7
51.2
CT
35
42.9
22.9
28.6
0.0
85.4
15.1
42.9
CB
24
41.7
33.3
20.8
0.0
81.1
-4.6
41.7
Every pitch type he threw, ordered by balls in play. Rows under 5 BIP are dimmed rather than dropped — a slider put in play twice is a fact about the slider.
Arsenal
Pitches
5
54th pct
Effective mix
4.5
74th pct
Separation
22.6
82nd pct
Shape scatter
2.9 in
34th pct
Velo range
15.1 mph
83rd pct
SW · FF · CB · SI · CT
2026 season, 2,960 pitches; percentiles vs MLB pitchers with 100+ that season. A description of the arsenal, not a grade: none of these predicted next season beyond Pitching+ and his own prior year. For shape scatter a higher percentile is MORE scatter.
Run value by pitch2026 · measured
Pitch
Pitches
PA reach
RV/100
Lg avg
CB
666
410
-0.22
-0.34
CT
174
125
-0.79
-0.07
FF
809
431
+0.86
-0.01
SI
461
294
-0.78
+0.27
SW
850
447
+1.12
-0.01
RV/100 is pitcher-positive (runs saved per 100 pitches). These are results: on a sample this size most of the gap between pitchers is the bounce of the ball, so the column never colours and never ranks a grade. The expected-value half of this card (xRV/100, locations, xwOBA) needs the run-value model and does not ship yet.
Location value
runs per 100 pitches vs league
Total
+0.07
69th percentile
Where he throws
+0.05
63th percentile
Which pitch there
+0.03
62th percentile
Heart34.1%
+174.27/100
Shadow37.7%
+115.87/100
Chase19.8%
−286.13/100
Waste8.4%
−497.23/100
What makes up the total
chase · FB4.3%−0.23
heart · FB10.6%+0.22
waste · SL4.8%−0.19
heart · SI7.4%+0.18
shadow · SL9.6%+0.13
15 other locations−0.04
Total+0.07
Pitcher-positive, centred on the 2026 league mean (+0.01 RV/100). Ranks are descriptive: the year-to-year reliability of this mix on MLB has not been measured yet, so no cell is verdict-coloured. His actual run value minus this mix — execution — is deliberately not shown.