Rockies catcher Wilin Rosario has posted great numbers this spring but has been particularly effective against right-handers. He has a .457/.487/.914 line in 35 plate appearances against righties that includes all four of his spring home runs.
Rosario struggled against right-handers during his breakout 2012 season, hitting just .239/.286/.440 in 308 plate appearances against them while hitting half of his 28 home runs in just 118 plate appearanes against lefties. Continued gains against right-handed pitching would go a long way toward making Rosario a complete hitter at the plate.