I'd only pick a player on a non-playoff team if his stats were MARKEDLY better then any players on playoff teams.
Think about it- lets take WAR (cause I know you kids love you sabermetrics). Cabrera's WAR is 6.5, those 6 games are the difference between the Tigers winning the Central, and missing the playoffs completely. Trouts is 10.5, those 10.5 are the difference between the Angels placing 3rd in the West and missing the playoffs... and placing 3rd in the West and missing the playoffs.
So really, wheres the "value" in MVP? Trout's a great player, he's going to win ROTY. But Cabrera, along with putting up better stats, has been more valuable to his team.
That's your argument? Trout has 2 assists and 2 errors, there are 11 players in the AL with more assists, and about 40 with less errors. Yeah, Cabrera has 13 errors at 3rd, despite it being his first year there since moving over for Prince. "But but but but... RANGE!" Save your range factor for some who gives a shit. Fact is defense plays a substantially smaller role in determining value then hitting does.