The Knicks are still listing him as day to day, when he was previously diagnosed with a "sore left foot."
Wallace, who had been serving as Tyson Chandler's backup at center, has missed the past four games, during which the Knicks have gone 2-2. With Wallace out, Chandler has been playing additional minutes. Not only is Wallace out, but Marcus Camby has plantar fasciitis.
Another big, Knicks star Amar'e Stoudemire, hasn't played at all this season, as he's returning from a surgically repaired left knee. Coach Mike Woodson said after practice on Saturday that Stoudemire won't play on Sunday, but will make next week's road trip.
"We did talk this morning in great detail, but nothing has been defined yet in terms of when he's going to return," the coach said after Saturday's practice. "It's still kind of like day to day until he's comfortable and ready to go, and he's not there yet."
Stoudemire will accompany the team on their road trip, starting on Tuesday against the Los Angeles Lakers, but Woodson suggested that it's more for the guys to stick together during the holidays.
"At this point, right now, we're still trying to hash out when he's ready to play," he said, "and he's not ready yet."
What Woodson wants is more practice time for Stoudemire, who had left knee debridement in late October. And with the schedule ahead, that won't really come until next month after the Knicks' three-game road trip that also includes stops in Phoenix and Sacramento.
"We've got some practice time coming our way," he said. "January should be a little bit better for us, in terms of being able to getting back to practice because we desperately need it."
Stoudemire went through rehab and the team's film session during their light practice on Saturday. Woodson said the power forward hasn't suffered any setbacks since his return to practice on Tuesday and Thursday with the Knicks' D-League team, the Erie BayHawks. During the second scrimmage on Thursday, he looked sharp in the post and with his lateral movements on the defensive end.
Jared Zwerling is a regular contributor to ESPNNewYork.com.