Who Was The Last Switch-Hitting A.L. M.V.P.?

Today's baseball trivia question:  Who was the last switch-hitter to win the American League M.V.P.?

Hint to today's trivia question---It was done in the 1970s.

Answer to yesterday's baseball trivia question--Bill Mazeroski of the Pittsburgh Pirates holds the career record for double-plays by a second baseman.  Here's a video of his historic 1960 World-Series-winning home run.