The Rockies activated Karros (concussion) from the 7-day injured list Monday.
Karros has been on the 7-day concussion IL twice in the last few weeks, but he cleared protocols last week and went 6-for-15 with a home run in four rehab games with Double-A Hartford. The 24-year-old will regain his role as the Rockies' primary third baseman down the stretch.