The Facts: The foot injury that kept Crabtree out of player-run practices in June is more serious than previously believed, and the 49ers' top wideout could miss four to six weeks of training camp and the preseason, according to a source with knowledge of the situation.

Diehards Line: According to Bee staffer Matt Barrows, that's why the 49ers were in the running for veteran wide receiver Chad Ochocinco, who was traded from Cincinnati to New England earlier today. The 49ers will continue to pursue a veteran receiver on the free-agent market who could perhaps start opposite Josh Morgan when the season begins. ... The exact nature of the injury is not known. The 49ers will place Crabtree on the physically-unable-to-perform list to begin training camp. Players who begin training camp on the PUP list can be moved to the active roster at any time. If a player begins the regular season on the PUP list, however, must sit out his team's first six games.