Pitcher Fatigue Rating

So I was looking at the "F" rating on box scores. Does anyone know if the F rating as shown is before or after the at bat? So if we see an F1, does that mean as a result of the last AB, the fatigue rating is F1 for the next batter?

It would seem this represents the fatigue rating at the end of the AB, but aren't we more interested in what it looks like prior to the next batter?

Help is welcome!

sschu

So I was looking at the "F" rating on box scores. Does anyone know if the F rating as shown is before or after the at bat? So if we see an F1, does that mean as a result of the last AB, the fatigue rating is F1 for the next batter?

Yes, the rating is for the next batter.

To your second question, well, with very rare exceptions, a pitcher that comes in the game is always F9. The rare exceptions I can think of are:
-a reliever who comes in for a third straight game and who has reached his inning number (a R3 who has pitched less than 3 innings in the two preceding games without pitching 2 innings in any of the two games will have a F-9 state)
-a starting pitcher who comes in relief without proper rest

For pitchers already in the game, the last F-state doesn't change in-between innings.