2007-07-13 03:19:46 · 4 answers · asked by bengalbooster 1 in Sports ➔ Baseball
Runs divided by innings pitched times 9
(R/IP) * 9
The way this works is the inital caluculation gives a ratio of runs-per inning. You multiple runs-per-inning by 9 and you have runs per game.
For example, a guy pitches 2 inning, allows 1 run. 1/2=.5; he allows .50 runs per inning. Multiply 9 by .50 and you get 4.50 - the ERA for allowing a run every other inning.
Hope that explains it!
2007-07-13 03:24:46 · answer #1 · answered by cujo101115 2 · 1⤊ 1⤋
ERA == (earned runs * 9) / (innings pitched)
That's it. Convention calls for two decimal places.
2007-07-13 03:22:43 · answer #2 · answered by Chipmaker Authentic 7 · 0⤊ 0⤋
cujo expalined it well, but another way of explaining it is runs per inning x 9. i like WHIP better as a measure of overall effectiveness, particularly for relievers.
2007-07-13 03:41:53 · answer #3 · answered by waytoosteve 3 · 0⤊ 1⤋
divide his run earned by innings pitched and round to the nearest hundredth
2007-07-13 04:18:30 · answer #4 · answered by Screw Monetarism 4 · 0⤊ 2⤋