The Arizona Diamondbacks selected right-handed pitcher Jhoulys Chacin from Triple-A Reno to start tonight's game, optioned right-handed pitcher Zack Godley to Double-A Mobile and designated outfielder Danny Dorn for assignment, as announced by D-backs Sr. Vice President & General Manager Dave Stewart. Chacín, 27, signed with the D-backs as a Minor League free agent on June 20 and in 12 starts for Triple- Reno went 5-3 with a 3.39 ERA (30 ER in 79.2 IP) and 6 quality outings. He began the season with Triple-A Columbus (Indians) and went 6-6 with a 3.33 ERA (121.2 IP) in 19 starts between Columbus and Reno this season.

The 6-foot-3, 215-pound, right-handed pitcher will wear No. 47 in his D-backs debut. He has appeared in 124 career games (109 starts) for Colorado, going 38-48 with a 3.78 ERA (282 ER in 672.0 IP) and 514 strikeouts. Chacín ranks among Rockies franchise leaders in strikeouts (7th), wins (8th), games started (8th) and innings pitched (8th), and was the club's Opening Day starter in 2013. He was signed by Colorado as a Minor League free agent on Sept. 27, 2004.

Godley, 25, went 4-0 with a 1.90 ERA (5 ER in 23.2 IP), 22 strikeouts and a .220 opponent average (18-for-82) in 5 games (3 starts) for Arizona. He is the second D-backs starter to win his first 3 Major League outings (also: Chase Anderson in 2014). Dorn, 31, hit .167 (5-for-30) with 1 double and 3 RBI in 23 games for the D-backs.

I heard about this possibility over the weekend, but when Matt Reynolds was called up to replace Keith Hessler in the bullpen for Sunday's game, it seemed like the moment had passed. However, turns out there was only a slight postponement. The word is that this is supposed to help out Robbie Ray by giving him an extra day between starts; no word as yet as to whether this will be a permanent move i.e. the D-backs going to a six-man rotation, or if this is just a a spot start to help tide us over until the rosters expand on September 1.

Chacin last appeared in the majors with the Rockies in 2014, going 1-7 with a 5.40 ERA, but overall, has performed pretty well for Colorado; a 3.78 career ERA works out at an ERA+ of 120, which would be an improvement over anyone currently in the Diamondbacks rotation (even Robbie Ray, who is npow at an ERA+ of 118). Of course, the big question is whether Chacin can get back to that level, given it has been a couple of years since he was there. Still, a 3.29 ERA over a dozen starts at Reno is not a disaster; I'll be interested to see what he can do tonight at Chase, against the team with the best record in the majors.