At his Monday press conference, coach Jim Harbaugh was open to the idea of activating Jon Baldwin on game day. "That's possible," said Harbs. "He's doing a good job." Baldwin has been a healthy scratch in each of the first three games. In the meantime, 49ers wideouts have struggled mightily to get open, and Vernon Davis is battling a bad hamstring. Look for Baldwin to get some snaps Thursday night in St. Louis.