Zach Edey's return was pushed back by a couple of weeks after the center tested his injured ankle on Wednesday.
Edey initially suffered the injury on November 17.
The center was preparing to return by practicing with the G League's Hustle.
"He was with the Hustle [Wednesday]. He was going through, testing it out. We just weren't comfortable with where he's at," said Taylor Jenkins.
The Grizzlies announced earlier in the week that GG Jackson would return in 6-8 weeks.
Via ESPN