The Rangers will promote Kumar Rocker to start Thursday against the Mariners in Seattle.
That was supposed to be Jack Leiter’s turn, so we’ll see what happens there. Rocker is throwing the ball extremely well at the moment, and that’s a very favorable first matchup, so it’s worth the risk to pick him up. His last seven outings between Double- and Triple-A have produced a 0.91 ERA and a 47/4 K/BB in 29 2/3 innings. It should be noted that his season high for pitches is 72, so it might be tough for him to go five innings against the Mariners.