Rockies add prospect Anderson, designate Nicasio

The Rockies added left-handed pitcher Tyler Anderson to their 40-man roster and designated right-handed pitcher Juan Nicasio for assignment on Thursday. Teams had until 9:59 p.m. MT on Thursday to set their 40-man rosters in advance of next month's Rule 5 Draft.

Anderson, 24 and Colorado's No. 12 prospect according to MLB.com, was originally selected by the Rockies in the first round (20th overall) of the 2011 First-Year Player Draft out of the University of Oregon. The 6-foot-4 left-hander spent the 2014 season at Double-A Tulsa, where he was named a Texas League All-Star and the league's Pitcher of the Year.

This past season season, Anderson went 7-4 with a 1.98 ERA, 40 walks and 106 strikeouts in 23 starts. He went 4-1 with a 1.01 ERA in 11 starts after the All-Star break. Over his three professional seasons, Anderson is 23-10 with a 2.38 ERA, 95 walks and 263 strikeouts in 59 starts.

Nicasio, 28, split the 2014 season between Colorado and Triple-A Colorado Springs. For the Rockies, Nicasio went 6-6 with a 5.38 ERA, 31 walks and 63 strikeouts in 33 games (14 starts). At Triple-A, he was 3-2 with a 4.54 ERA, 15 walks and 36 strikeouts.

Video: COL@ATL: Nicasio tosses six scoreless innings

Nicasio has pitched in the Majors for Colorado in each of the past four seasons, compiling a career mark of 21-22 with a 5.03 ERA, 135 walks and 294 strikeouts in 88 games (69 starts).

The Rockies currently have a full 40-man roster.