1
In 2009 the Red Sox had the SECOND HIGHEST flyball% (40.9%) in all of baseball. This is why Bay's 09 RF numbers are out of whack. If you go even a year back with RF you can see that they rated him -30 runs in '08.
I'm not saying that Bay is a true minus 30 run outfielder, but his range+arm make him at least a minus 10 run LF, and hes not going to get better with age.
In '06 the Red Sox had a medium flyball percentage at 36.6%.