49ers signed WR Dominique Zeigler, LB Martail Burnett, OT Alex Boone, and DL Khalif Mitchell to reserve/future contracts.
Zeigler, a slot/flanker type with some return value, has the best shot here to make the 2010 roster, with Boone a close second. Boone is limited to only right tackle, however, and versatility is essential for reserve linemen.
