All-Pro left guard Mike Iupati is unlikely to be cleared to participate in the San Francisco 49ers' offseason team activities following shoulder surgery.
The nature of the procedure isn't known, but Iupati was on the injury report for the final seven games last season, including the postseason, with a shoulder injury.
Iupati has started all 48 regular-season games in his career and played nearly 99 percent of the 49ers' offensive snaps last season.
The Sacramento Bee reported the surgery was considered minor. It's his second shoulder operation (2007).
Veteran Adam Snyder signed a two-year deal Monday and could be viewed as an insurance policy in the unexpected event Iupati is unable to begin training camp at full strength.
Iupati is entering the final year of his rookie contract and a candidate for a long-term extension. The 49ers acknowledged Iupati's deal was a priority on April 15.