Innings pitched counts outs, not innings, which is why the decimals look strange. An IP of 195.2 means 195 innings and two outs — it is thirds, not tenths, and it never goes past .2.

Volume is the half of pitching value that rate stats hide. A reliever with a 1.80 ERA in 60 innings prevented fewer runs than a starter with a 3.30 ERA in 200, because the starter absorbed 140 more innings that would otherwise have gone to someone worse.

NUT treats innings the way it treats plate appearances for hitters: as the scale of the contribution. That is what separates a durable mid-rotation starter from a dominant short-workload arm on the season board, even when the second one has the better ERA.

What is a good IP?

NUT is a counting stat, so innings are the multiplier. A 2.90 ERA over 190 innings produces far more NUT than the same rate over 90.

Related Stats