If you mean: 5f+10 = 10f then the value of f works out as 2
A 5f
No such category in baseball.
team
e = 5f f = e/5
Batters Faced.
caught stealing
Position
Stolen bases.
Offensive Errors
5F stands for 5 Francs, the currency of France before the conversion to the Euro.
It means Games Behind.