GUIDES · BETSLIP DOCTOR
Why does 5.2 innings pitched not mean five and two-tenths innings?
Innings pitched is based on recorded outs, not decimal tenths: three outs make one inning and each out adds one-third. In baseball notation, 5.2 means five full innings plus two outs, or five and two-thirds innings.
For Bettors and cappers learning to read baseball records · Updated
The partial inning records outs
An inning contains three outs. MLB credits a pitcher with one-third of an inning for each out recorded while that pitcher is on the mound.
So the digit after the point in a display such as 5.2 is a count of outs in the partial inning, not a decimal fraction of a tenth.
Convert to outs before combining lines
Turn each full inning into three outs, then add the partial outs. Only after summing should you convert the total back into full innings and remaining outs.
This avoids treating two outs as 0.2 of an inning or adding decimal-looking entries as ordinary fractions.
Hypothetical two-line conversion
Fictional example: 5.2 IP is 5 × 3 + 2 = 17 outs. A second line of 0.2 IP is two outs. Together they are 19 outs: six full innings, with one out remaining, written as 6.1 IP. The calculation is in outs, not 5.2 + 0.2 decimal innings.
Related questions
How many outs are in 5.2 innings pitched?
Seventeen outs: fifteen outs in five complete innings plus two more outs.
What does 0.1 innings pitched represent?
One recorded out, which is one-third of an inning.