Baltimore Orioles outfielder Luke Scott, who has been bothered by a labrum problem in his shoulder for most of the season and has been trying to play through it, was placed on the 15-day disabled list today. Scott has a torn right labrum.

Scott also suffered a knee injury when he ran into the outfield wall in Baltimore during the Birds' recent series with the St. Louis Cardinals, according to the Sporting News.

Replacing Scott on the active roster for Baltimore will be 25-year-old righthanded pitcher Mitch Atkins, who signed with the Orioles last offseason after several years in the Chicago Cubs' system. Atkins has made 14 starts at three levels of the Orioles organization this year with a 1.12 WHIP and 3.18 ERA and just six home runs allowed in 82 innings. For the Cubs in 2009 and 2010, Atkins posted a 5.25 ERA in seven relief appearances covering 12 innings.

Atkins will make his first major league start Tuesday night against the Rangers at Rangers Ballpark in Texas. The move gives the Orioles a 13-man pitching staff.