Knicks F Jeremy Tyler (foot surgery) isn't guaranteed a spot on the roster, according to Mike Woodson, despite having a partially guaranteed contract. Tyler has a guaranteed $100k this season and his contract has no full guarantee date, according to ShamSports.com. New York is thin behind Tyson Chandler, however, with Andrea Bargnani and Kenyon Martin as the most likely backup centers if Tyler doesn't make the squad. Tyler had surgery to repair a stress fracture in his fifth metatarsal in early September, and he may not be healthy in time for the season opener.