Mann is on assignment with the G League's Oklahoma City Blue and won't be available Monday for the Thunder's game against the Hawks, Rylan Stiles of BricktownBuckets.com reports.
Mann will stick around in the G League after pouring in 19 points in his most recent outing Saturday against the South Bay Lakers. The rookie first-round selection has appeared in 10 games at the NBA level this season, averaging 5.2 points in 10.9 minutes per contest while shooting 45.7 percent from the field.