Zach Randolph suffered a right knee injury in the first quarter vs. the Bulls on Sunday. Teammate O.J. Mayo fell into Randolph after his shot was blocked.
Randolph was scheduled to have an MRI on Monday.
Randolph's agent, Raymond Brothers, told USA TODAY via text message Monday night that the MRI revealed a bone bruise.
The Grizzlies say Randolph's status is day-to-day and he will travel with the team.