SANTA CLARA, Calif. -- San Francisco 49ers coach Jim Harbaugh celebrated the team's overall health this offseason, on the day two of Michael Crabtree's key offensive teammates said how good the receiver has looked.While the 49ers held out several players throughout the offseason with minor injuries, Harbaugh noted Thursday, as the team ended its three-day minicamp, that they didn't endure any significant injuries during the nine-week offseason program.