49ers' Crabtree out with injury

SAN FRANCISCO, July 29 (UPI) -- San Francisco wide receiver Michael Crabtree has an injury that could make him miss more than the first month of the NFL season.

The 49ers on Friday placed Crabtree on the Physically Unable to Perform list. While the team didn't say how long Crabtree was expected to be out, The Sacramento Bee reported the wide receiver would be out 4-6 weeks due to a foot injury.

If Crabtree is unable to play when the regular season begins, he would have to stay on the PUP list for at least six weeks.

In his first two NFL seasons, covering 27 games, Crabtree has caught 103 passes for 1,366 yards and eight touchdowns.

The 49ers also said they released quarterback David Carr, who was the No. 1-overall draft pick by Houston in 2002. In addition to the Texans, Car played for Carolina and the New York Giants.