A key reason for acquiring Lindstrom is for protection in case right-hander Huston Street is injured. Street missed the first 69 games of last season with a shoulder injury and suffered some setbacks during his rehab. Left-hander Franklin Morales, who is still with the club, struggled when replacing Street. Manuel Corpas, the Rockies' one-time closer, had some success in the role but was released after the season.The trade for Lindstrom also pushes the Rockies' Major League roster to the limit of 40, which means they'll need to either make all further signings Minor League contracts, or they'll have to make a move to add someone on a Major League deal. The Rockies have acknowledged that they're trying to re-sign left-handed starter Jeff Francis, their No. 1 pitcher before shoulder injuries marred his last two seasons, and left-handed reliever Joe Beimel. Musick, who turns 24 on Dec. 30, was the Rockies' ninth-round pick in the 2009 First-Year Player Draft. Musick went 8-7 with a 4.05 ERA in 23 starts, and 122 1/3 innings, at Class A Asheville last season, his first in a full-season league. Musick struck out 109 against 26 walks. Aristil, 24, played for the Rockies' Dominican Summer League team as an infielder from 2004-06 before converting to the mound. Last season, he went a combined 2-5 with a 5.90 ERA in 33 games (four starts) at three levels. He was 1-4 with a 7.12 ERA while appearing in relief for all but one of his 21 games at Class A Modesto, 1-1 with a 4.39 ERA with three starts in 11 appearances at Double-A Tulsa, and made a scoreless two-inning appearance for Triple-A Colorado Springs. He is 1-0 with a 2.08 ERA with a .226 average against in eight appearances in the Dominican Winter League.
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. Brian McTaggart contributed to this report. This story was not subject to the approval of Major League Baseball or its clubs.