There are several worthy candidates in the pitching department early in the season. Both from the rotation and from the bullpen.
By going 2-0 with a 2.95 ERA through his first 3 starts of 2016, Cole Hamels has extended his streak of regular season starts without a losing decision to 13. As a result, Cole continues to look very much like the ace the rangers were hoping for when he was acquired at the deadline last season.
However, at this point in the season, due to the limited number of starts for the rotation, in conjunction with the early season struggles for the Texas Rangers beleaguered bullpen.