INDIANAPOLIS, Indiana (Reuters) - Indianapolis Colts defensive back Bob Sanders has been ruled out indefinitely with a torn right biceps, the team said on Wednesday.

The 2007 Defensive Player of the Year, Sanders was hurt during Sunday's season-opening loss to the Houston Texans when he fell awkwardly in his first series on the field.

He had surgery on Wednesday and will remain on the team's active roster while his rehabilitation is monitored, the Colts said on their website (www.colts.com).

Sanders, who helped the Colts to a Super Bowl triumph and earned two Pro Bowl selections from 2005-07, has been plagued with injuries -- including a torn left biceps -- over the last two seasons and appeared in just eight games.

(Reporting by Jahmal Corner in Los Angeles; Editing by Greg Stutchbury)