I just noticed that Mike Trout has 7.8 rWAR this season, after earning 10.7 rWAR last year. Miguel Cabrera’s highest rWAR in any season of his career, was 7.6 (in 2011). Right now, Cabrera has 7.0, so he has a chance to have a Mike Trout type season with 1 month to go. Although, it’s doubtful that he can make up 0.8 rWAR and whatever extra he needs to match whatever Trout earns this month.
Looking at fWAR, there’s a similar story. Trout’s earned fWAR’s of 10 in 2012 and 8.8 so far this season. Cabrera has never done better than 7.7 fWAR, which is this season, with a month still left to go.
No matter how you look at it, according to WAR, Trout’s already had 2 better seasons than any season Miguel Cabrera has ever managed.