PFT has confirmed that Dorsey is expected miss the season with a torn biceps muscle. The news was first reported by Adam Schefter of ESPN.
Per a source with knowledge of the situation, Dorsey could be back to 100 percent within four months, if the tear is clean. If the muscle is frayed, Dorsey would miss five to six months. That distinction creates a window of opportunity for the 49ers to placed Dorsey on injured reserve with the designation to return.
A decision about Dorsey’s status is expected to be made after surgery on Monday.
Dorsey suffered the injury during practice on Friday, the worst kind of 29th birthday present he could have imagined. Before practice, coach Jim Harbaugh praised Dorsey’s growth in the team’s system.
“It’s been A-plus, plus,” Harbaugh told reporters on Friday. “What a great thing having him last year. Fit in so seamlessly with that group of talented defensive lineman. Was a great contributor, a starter for us. Known friend and trusted agent. Just thank him for being good, thank him for being who he is and how he goes about his job. He’s a team guy all the way.”
Dorsey, a top-five pick of the Chiefs in 2008, appeared in 16 regular-season games with 13 starts last year. He also appeared in all three postseason games, starting two of them.