Hal E. Famer, good glove, bad bat, hit .301 last year making 150 hits in 600 at bats. Wait...that is only a .250 average you say.
Looking more closely at Hal's stats you will see he made out on curve balls 85 times. Since he does not look to hit curve balls, we will have to "stop counting" those at bats.
You will also see that Hal hit better in August and September so we will have to "seasonally adjust" his season average up 10 points to compensate for the better performance at the end of the season.