LyDia's Lab
Offense Matchup Tool
Which lineup is hot, which is actually good, and how each hits the hand of tonight's opposing starter. Quality and heat are different things — this tool shows both, plus the actual starting lineup once it posts.
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How to read it: wOBA (window) is quality right now; Δ vs season is heat — a bad offense can be hot and an elite one can be cold. wOBA (weighted on-base average) uses linear run-value weights instead of OPS's unweighted on-base-plus-slugging, so it is the better read on which lineup is actually scoring more — that is why it drives the tier labels and the heat read here (OPS is still shown alongside as a reference stat). Tier labels translate the decimals: every ~15 wOBA points is roughly one class of offense (.295 below avg · .310 average · .325 good · .340 great · .360 elite). HOW a team is hot matters: contact-driven heat holds up; strikeout-heavy power binges collapse. The vs-hand line is each lineup's full-season OPS against tonight's opposing starter's throwing hand. Starting lineup shows the actual posted batting order once MLB posts it (usually ~2 hours before first pitch) — before that it falls back to a note, not a guess. Each hitter's line is over the same window selected above, not season totals: PA is the sample size, OBP is how often he reaches base, ISO (SLG − AVG) is raw power, K% is how often he strikes out — colored green/red at the good/bad ends of each. Short windows mean small samples; check PA before trusting a hot or cold number.