Jon Lester: Right-handed?

Jon Lester bats, throws, and golfs lefthanded. But he signs autographs (and so presumably writes) righthanded. It's relatively common for baseball players to bat lefty and throw righty (sometimes the only glove around when they're learning is righthanded, while bats are obviously ambidextrous), but I have never heard of someone who writes with their right hand, and does everything else with their left.

Check out the video on Boston.com (Lester starts autographing at about 30 seconds).

 Signed with Jon Lester's right hand.