Matt Barrows of the Sacramento Bee reports The 49ers just wrapped up their mandatory three-day minicamp. Usually, this would be a bit of an event. However, the team now has four days of OTAs that begin tomorrow. The big news of the day — and this is all relative — is that rookie receiver Michael Crabtree was seen sprinting with trainers. Now I’m not here 24 hours a day, so I don’t know Crabtree’s exact rehab regimen after foot surgery in March. But as far as I can tell, this is the first time Crabtree’s actually run — and run fairly hard — on the foot since the procedure. Under the supervision of strength coach Duane Carlisle, Crabtree ran perhaps a dozen sprints of about 40 yards on the team’s artificial field. He seemed to be going about three-quarters speed.