Prince Fielder

The Texas Rangers slugger was on a consecutive-game streak that ended at 547 (not exactly Cal Ripken numbers, but these days, impressive) when he hit the disabled list (the first time in his career) for a herniated disk in his neck. Now, after surgery, he's likely out for the season. Fielder can be polarizing, which may partially explain why he has never been a huge endorsement deal draw, but he has sponsorships from Nike, Rawlings, and New Era.