The San Francisco 49ers included Anquan Boldin on Monday's injury report with a hamstring injury, and Eric Branch has found some context for the injury. Branch went back and looked the film, and saw Boldin come up gimpy during the failed 2-point conversion. You can read the full rundown here, and here is some video Branch put together:
Boldin hops at one point to avoid a teammate, but he seems to be slowed down by the hamstring. As Branch pointed out, he was not on the field for the team's final series.