We’ve all heard about Mark Melancon. We know he’s one of our Tommy John Rehab Watch guys, and we know that the buzz is growing surrounding Melancon. We heard he could be the next eighth inning guy for the Yanks and a possible replacement for Mariano Rivera when that time finally comes. But just who is Mark Melancon? Today, Tyler Kepner answers that question in a profile on the 23-year-old. Check it out.