-0.2 WAR with those offensive numbers? Whoa! As others have suggested, check his defense and baserunning to see if it's declined. That's still a precipitous drop. It didn't exactly come without warning (10.2 to 9.9 to 8.6 to 5.5 to 3.5, a slight bump to 4.5, and then another huge drop to -0.2 from 1904 through 1910), but it's still pretty massive.
You have to also consider his age in these things. He's gone from 29-35 in those seven seasons, and from 32 on is considered to be a player's decline years. That seems to be in line with his first big drop (8.6 to 5.5), so it might make sense, even if it sucks.
From the name (nap.PNG) of the file, I'm thinking this is Nap Lajoie, which means he's really hit a rough time compared with the RL guy. Do you have player development on? Do you have recalc on? What are the recalc settings? Player development settings? These are important to figure out what's going on here.
The player development settings can be found at Game Settings > Players & FaceGen > Player Development Settings, and the recalc settings can be found at Game Settings > League Settings > Historical > Historical Player Ratings. Crucial to know these in order to figure out what's going on, and how to fix it the way you want it for your future games.
