Rockies select pitching prospect for MLB debut

The Rockies announced they’ve selected right-hander Dugan Darnell and recalled lefty Carson Palmquist. They’ll take the roster spots opened by the Tyler Kinley and Jake Bird trades. Colorado’s 40-man roster count sits at 39.

Darnell, 28, is up for the first time. He’s a former undrafted free agent who owns a 3.74 ERA over five seasons in the Colorado system. Darnell has spent the entire season with Triple-A Albuquerque. He’s having a good year, allowing 3.19 earned runs per nine through 53 2/3 innings. He has punched out 28.8% of opposing hitters against a league average 8.7% walk rate. Darnell has a three-pitch mix with a 94 mph fastball and uses a mid-80s splitter as his best secondary pitch.

Colorado first promoted Palmquist in May. The former third-round pick started his first seven MLB appearances but was tagged for a 7.63 earned run average. General manager Bill Schmidt tells Patrick Saunders of The Denver Post that the Rox are permanently moving Palmquist to the bullpen. The southpaw has only averaged 90 mph on his fastball as a starter. His velocity could tick up in shorter stints, though he’s unlikely to ever be a flamethrower. Palmquist has missed a lot of bats in the minors but has a career 11.1% walk rate over four professional seasons. It seems the Rox don’t feel he has the command to stick in a rotation and would rather see how his stuff plays in relief.