PT TOMORROW: NL West—Corbin on his way back

Arizona Diamondbacks

The Arizona rotation has gone through several recent changes, and there may be more on the way. Opening Day starter Josh Collmenter (RHP, ARI) was sent to the bullpen and top prospect Archie Bradley (RHP, ARI) hit the DL with shoulder tendinitis. Perhaps related to the injury, Bradley's ugly 5.6 Ctl over eight starts has doomed his overall performance, and it's quite evident he'll need some more seasoning in the minor leagues. Collmenter's xERA has been above 4.00 every season since 2012, and it ballooned to a career-worst 4.61 through 12 starts this season.

Robbie Ray (LHP, ARI) and Allen Webster (RHP, ARI) have led a youth movement in the rotation, and the early returns have been good. Ray has given up just three...

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