Vs. pull-fly-ball-prone pitcher (>18%)tonight
1.85× HR rate
279 yes / 67 no · 60 HRs
Summer game (Jun-Aug)
1.57× HR rate
156 yes / 190 no · 60 HRs
Vs. short-leash starter (avg IP < 5.0)tonight
1.51× HR rate
147 yes / 196 no · 60 HRs
3rd time through order vs starter
+46%
158 yes / 188 no · 60 HRs
Hot streak (L5 avg EV > career baseline)tonight
+41%
229 yes / 108 no · 60 HRs
Vs. fly-ball-prone pitcher (FB% allowed > 40%)
+40%
51 yes / 295 no · 60 HRs
Platoon advantage (LHB-vs-RHP or RHB-vs-LHP)tonight
+38%
205 yes / 76 no · 47 HRs
HR-friendly park (factor ≥ 1.10)tonight
0.62× HR rate
49 yes / 295 no · 60 HRs
Vs. HR-prone pitcher (HR/PA > 3.8%)
+38%
57 yes / 289 no · 60 HRs
First-pitch temperature > 78°F
+34%
75 yes / 255 no · 60 HRs
HR-suppressing park (factor ≤ 0.95)
+34%
39 yes / 305 no · 60 HRs
Opposing starter's recent FB velo down ≥1 mph
+32%
52 yes / 267 no · 58 HRs
Wind blowing out (≥10 mph, outdoor)
−27%
17 yes / 313 no · 60 HRs
Batting 3-4-5 in the order
−26%
100 yes / 246 no · 60 HRs
Cold month (Apr / Sep / Oct)tonight
−22%
102 yes / 244 no · 60 HRs
Opposing starter coming off >7 days rest
−22%
55 yes / 278 no · 59 HRs
// LIFT = P(HR | factor true) ÷ P(HR | factor false), Bayesian- shrunk with K=30 pseudo-games. Significance requires |lift − 1| ≥ 0.20 AND smaller cohort n ≥ 15. Cohort = top 60 HR hitters, last 2 seasons. Refreshed weekly. Green/red = the factor's effect on tonight's HR chance; gray = not in play tonight.