MLB Sims

Red Sox @ Royals

2026-05-20

Kauffman Stadium · park factor 1.02 · first pitch 2026-05-20T23:40:00Z

Win probability

BOS
41.7%
KC
44.6%
Extras needed
13.6%

Expected runs

BOS expected
4.35
KC expected
4.41
Total expected
8.76
Total — 10/median/90
5 / 9 / 13

Most likely final scores

Score (BOS–KC)Probability
4 – 33.71%
4 – 43.65%
3 – 43.57%
3 – 53.34%
3 – 33.21%
4 – 53.17%
5 – 53.12%
5 – 43.00%

Over / under

LineOverUnder
10.5 25.5% 74.5%
6.5 77.2% 22.8%
7.5 64.2% 35.8%
8.5 50.5% 49.5%
9.5 37.3% 62.7%
These numbers come from 10,000 Poisson simulations using season-to-date team strengths. No starting pitcher, lineup, or weather adjustment is applied (yet). Full methodology →