1
HRs allowed
2.9%
HR rate (pool)
20.3%
Overall HR/FB
2.82
FIP
2.72
xFIP
+0.10
FIP − xFIP gap
Leak meter
STINGY
LEAKY
87
season HR/FB pctile vs MLB pitchers — higher = more HR-prone
Tonight's read
vulnerability percentile · model flags
no model flags today
Vulnerability 87th pctile (season HR/FB pctile vs MLB pitchers)
Where he leaks
quality of contact allowed · season
Barrel% allowed
14.3%
Hard-Hit% allowed
61.3%
Fly-ball rate
—
avg HR 102.2 EV · 414 ft
max EV allowed 108.2
Batted-ball xSLG splits and HR spray direction aren't tracked for pitchers yet.
Recent form
HR allowed by scored game day
7D · 1 HR ↑
15D · 1 HR ↑
30D · 1 HR ↑
Dot size = HRs allowed that game day · scored pool only.
Threat Matrix
tonight's lineup × his arsenal families
No lineup yet — the Threat Matrix fills in when today's slate lists batters against Mason Montgomery.
Arsenal ledger
per-pitch damage against · season
PitchUseEVLAHRRV/100Damage
Fastball Hard
51.5%
82.3
27.1°
1
-1.1
Sinker Hard
16.1%
84.2
21.8°
1
-2.3
Slider Breaking
15.3%
77.7
-0.1°
0
-3.3
Curveball Breaking
14.4%
83.0
4.2°
3
+2.5
Changeup Offspeed
2.7%
80.1
-18.8°
0
-2.8
RV/100 = run value against per 100 pitches — higher = more damage allowed. Damage bar is scaled across his own arsenal.
Full ledger
pool + season datapoints · pctile-chipped where ranked
Pool matchups35
HRs allowed (pool)1
Pool HR rate2.9%
Pool HR/game day0.25
Top-15 matchups2
HRs to top-150
Overall HR/FB20.3% 87
HR/9—
FIP2.82 9
xFIP2.72
FIP − xFIP+0.10 54
Barrel% allowed14.3%
Hard-Hit% allowed61.3%
FB%—
K/9—
BB/9—
WHIP—
IP—
Pool = tracked matchup population · pctile chips = MLB-wide percentile (hot ≥ 85) · as of 2026-09-01
Fastball
Hard · 51.5% usage
-1.1
run value against / 100 pitches
Avg EV against82.3 mph
Avg launch angle27.1°
HRs allowed1
Pitches500
Sinker
Hard · 16.1% usage
-2.3
run value against / 100 pitches
Avg EV against84.2 mph
Avg launch angle21.8°
HRs allowed1
Pitches156
Slider
Breaking · 15.3% usage
-3.3
run value against / 100 pitches
Avg EV against77.7 mph
Avg launch angle-0.1°
HRs allowed0
Pitches148
Curveball
Breaking · 14.4% usage
+2.5
run value against / 100 pitches
Avg EV against83.0 mph
Avg launch angle4.2°
HRs allowed3
Pitches140
Changeup
Offspeed · 2.7% usage
-2.8
run value against / 100 pitches
Avg EV against80.1 mph
Avg launch angle-18.8°
HRs allowed0
Pitches26
Usage by handedness
what tonight's lefties/righties will see
Per-handedness pitch usage isn't tracked yet — the arsenal cache is a season aggregate.
Zone map
damage by location
Per-zone damage isn't tracked yet for pitchers.
Pitcher vs. Batter
career PA vs tonight's listed order
No listed order yet — BvP rows appear when today's slate lists batters against Mason Montgomery.
BvP under 20 PA is noise — use it for pitch-mix memory, not projection. Context only: not part of the model score.
HR Log
1 allowed · scored pool
avg 102.2 EV · 414 ft
1 in last 30D
DateBatterRankScoreStadiumEVLADist
Every row is a scored-pool matchup — HRs to unscored batters aren't tracked. Pitch type, count, and field direction aren't in the pool log yet.
Game-day log
last 4 scored game days · pool
DateStadiumMatchupsHRMax EV
2026-07-18
9
1
103.9
2026-06-07
8
0
105.2
2026-05-14
9
0
108.2
2026-04-27
9
0
103.2
Box-score start lines (IP · H · ER · K · BB · pitch counts) aren't tracked yet — this is his scored-pool day log, matchups our model actually graded.
Tonight
park factor · wind · temp
Ballpark conditions unavailable — Mason Montgomery isn't on a scored slate with park & weather inputs.
Fences vs his leak
wall distance · damage overlay
Mason Montgomery isn't on a scored slate — no park to compare his damage against.
Venue splits
HRs allowed by venue · pool
VenueFacedHRRate
9
1
11%
18
0
0%
8
0
0%
HRs allowed ÷ scored matchups at each park. Rate is per scored matchup, not HR/9 — box-score innings aren't tracked.
Common questions about Mason Montgomery
How many home runs has Mason Montgomery allowed this season?
Mason Montgomery has allowed 1 home run across 4 scored game days in the TheHomeRuns pool this season.
Model output for entertainment and research. Not gambling advice.