This year, I've broken the list into two tiers. The first group of seven is made up of players I expect to truly break out, with a big boost in their value on the field in 2014. The second group has four players in it, guys who had good years in 2013 but who I think have room for smaller improvements in 2014.
Skaggs struggled from day one in 2013, showing up in spring training with a shorter stride that led to an earlier, higher release point, lower velocity and a softer breaking ball. The Diamondbacks never fixed this problem, but the Angels have. Skaggs has been hitting 95 mph again this month with his old curveball back.