Glenn Dorsey hurt his arm Friday during practice. It was unclear what he injured exactly. Adam Schefter just cleared that up. Dorsey tore his bicep according to Schefter. Dorsey may miss the entire season.
After Dorsey tore his bicep, Mike Purcell took over as the first-team nose tackle for the rest of practice. Tank Carradine was the first-team three-tech in place of Justin Smith, who is injured, and Quinton Dial was the first-team five-tech in place of Ray McDonald, who also is injured.
Update on Dorsey from Schefter: “49ers DT Glenn Dorsey scheduled to undergo surgery Monday for a torn biceps injury expected to end his season.”