McCarthy (undisclosed) participated in Monday's practice, Kevin Seifert of ESPN.com reports.
After losing out on the QB competition with Kyler Murray to begin training camp, McCarthy proceeded to get banged up in Saturday's 13-3 preseason loss to the Ravens, taking one sack while completing five of 10 passes for 81 yards. Seifert noted that McCarthy handled three reps in team drills Monday, which is a bit less than normal, but the Vikings held the session in shells and not pads, so the third-year pro likely still is dealing with the issue.