Chatwood, 25, has spent the past three seasons in the Rockies organization and made his first Opening Day roster this past year. In 2014, he made just four starts for Colorado after opening the season on the disabled list and then was placed on the disabled list on April 30 before having UCL replacement surgery (Tommy John) on his right elbow in July. In his four starts, he went 1-0 with a 4.50 ERA (24.0 ip, 12 er) with eight walks and 20 strikeouts. He made one rehab start with Triple-A Colorado Springs on April 8, tossing 6.1 innings and allowing just one run for the win.
Acquired from the Los Angeles Angels of Anaheim on Nov. 30, 2011, Tyler has appeared in the Majors for each of the last four seasons, going 20-22 with one save and a 4.34 ERA (342.0 ip, 165 er) between the Rockies and Angels in 70 career Major League games, 61 starts. As a Rockie, he's 14-11 and one save with a 4.05 ERA (200.0 ip, 90 er) in 43 games (36 starts), including a 9-4 record with a 3.74 ERA (98.2 ip, 41 er) in 18 starts at Coors Field. The Redlands, Calif. native was originally selected by the Angels in the second round of the 2008 First-Year Player Draft.
Lyles, 24, started 22 games for Colorado during the course of 2014, his third straight year of 20 or more starts, going 7-4 with a 4.33 ERA (126.2 ip, 61 er). He began the season on the Triple-A Colorado Springs roster but was called up on April 2 before ever making an appearance for Colorado Springs. Lyles opened up his Rockies career winning each of his first five decisions which spanned eight starts, going 5-0 with a 2.66 ERA (50.2 ip, 15 er). On June 4 vs. Arizona, he left the game after 4.0 innings with a fractured left hand, an injury that occurred as he was covering home plate on a wild pitch in the first inning and was placed on the disabled list the following day, missing 54 games for the Rockies before being activated on August 6.
Lyles was acquired by Colorado, along with outfielder Brandon Barnes, on Dec. 3, 2013 from the Houston Astros for outfielder Dexter Fowler and a player to be named later (trade completed on June 4, 2014 for cash considerations). Overall in his career, the right-hander is 21-33 with one save and a 5.09 ERA (503.2 ip, 285 er) in 94 games/87 starts between the Rockies and Astros. The Hartsville, S.C. native was originally selected by Houston in the first round (38th overall) in the 2008 First-Year Player Draft.
Stubbs, 30, spent the entire season on Colorado's active roster after being acquired from the Cleveland Indians on Dec. 18, 2013. He hit a career-best .289 (112-for-388) with 22 doubles, four triples, 15 home runs, 43 RBI and 67 runs over 132 games. It was the fifth-straight season playing at least 130 games. In addition to his career-high .289 average, he set career marks in on-base percentage (.339), slugging (.482) and OPS (.821). The right-handed hitting outfielder batted .328 (43-for-131) with six doubles, seven home runs and 17 RBI against left-handed pitchers, a clip that was the sixth-best among National League players.
The Atlanta, Texas native was originally the first round pick (eighth overall) of the Cincinnati Reds in the 2006 First-Year Player Draft and made his Major League debut in 2009. He has played in 764 Major League games for three different franchises (Cincinnati, Cleveland and Colorado) and owns a career average of .246 (643-for-2609) with 102 doubles, 18 triples, 84 home runs, 266 RBI and 411 runs. In addition, he has stolen 147 bases in 179 attempts (82.1%), the sixth-highest percentage among players since 2009 (min. 150 attempts).
The Rockies currently have a full 40-man roster.