The Memphis Grizzlies are set for another huge matchup against the Oklahoma City Thunder on Wednesday. The Thunder are the No. 1 seed in the Western Conference and defeated the Grizzlies in their last matchup while the Grizzlies were ranked No.

Jaren Jackson Jr., who left Monday's game with an ankle injury, is listed as out with an ankle sprain. He is considered week-to-week with a Grade 2 ankle sprain, the Grizzlies announced Tuesday evening.

The Memphis Grizzlies are standing under the tough-luck cloud at the moment, having lost three straight games inside the final five seconds. And things got even darker on Tuesday as the team announced that Jaren Jackson Jr. has been diagnosed with a Grade 2 left ankle sprain with no clear timetable for his return.