Smart move, and not just because he hasn’t done well in his spring starts thus far. For one thing, he has pitched exclusively out of the bullpen in his two years in the bigs and only started one game in the minors, way back in 2010. For another thing, he had shoulder surgery back in October and, even if it was relatively minor, you don’t want to substantially increase the workload of a guy coming off of shoulder surgery. For another thing, he throws a fastball and a curveball, and that’s basically it, and that’s not going to get the job done as a starter.
Putting Bush back in the pen will end any remaining talk about the Rangers using a six-man rotation. It leaves the rotation as Cole Hamels, Matt Moore, Doug Fister, Mike Minor and either Martin Perez, if he’s healthy to start the season, or Bartolo Colon if he’s not. Grant says that Jesse Chavez could be used as a swingman to spot start or take over if Perez is hurt and/or the 44-year-old Colon is ineffective.
After returning to baseball following years in the wilderness — and time in prison — Bush was fantastic for the Rangers in 2016. He took a step back in 2017, though, posting a 3.78 ERA and a K/BB ratio of 58/19 in 52.1 innings. His K rate was up but his walk rate and hit rate were too, basically. The Rangers are obviously hoping that his fixed shoulder will help him whip back into 2016 form. He’s way more likely to do that as a reliever.