Crabtree (undisclosed) took part in Wednesday's practice, Steve Corkran of the Contra Costa Times reports. Crabtree has been held out of practice since July 31 with what was believed to be a hamstring injury, but it appears he is feeling good enough to return to the field in some capacity. The 49ers will likely continue to take it easy with Crabtree, so his action could be limited over the team's remaining preseason games.