Ken Griffey, Jr. just went down in the outfield. Trying to make a throw, he appears to have pulled a groin or hamstring. He was hurt badly enough that he threw the ball to the infield underhanded, and then crumpled to the ground.
See my earlier post today about the Reds declaring they'll play Griffey against the contending teams and rest him against the others. My premise is that they ought to rest him on a regular schedule, irrespective of the opponent. I don't know that this injury proves me right, but it certainly helps.