Risacher registered five points (2-5 FG, 1-3 3Pt), two rebounds and one steal over 14 minutes during Saturday's 127-117 loss to the Cavaliers.
Boozer finished with 15 points (7-13 FG, 0-3 3Pt, 1-3 FT), eight rebounds, five assists, two steals and two blocks across 29 minutes in Saturday's 129-110 win over the Nets.
According to Grizzlies head coach Tuomas Iisalo, Jackson suffered a "relatively serious" foot injury in Saturday's 129-110 win over Brooklyn, Michael Wallace of the Grizzlies' official site reports.
Irving ended with 34 points (11-25 FG, 7-16 3Pt, 5-7 FT), six rebounds, five assists, three steals and one block over 37 minutes in Saturday's 127-117 loss to Cleveland.
Coward finished with 23 points (7-13 FG, 4-6 3Pt, 5-6 FT), 12 rebounds, four assists, two steals and two blocks across 33 minutes in Saturday's 129-110 victory over Brooklyn.
Gafford (face) won't return to Saturday's game against the Cavaliers, Grant Afseth of DallasHoopsJournal.com reports.
Gafford (face) exited Saturday's game against the Cavaliers, Mike Curtis of The Dallas Morning News reports.
Jackson (foot) has been ruled out for the remainder of Saturday's game against the Nets.
Spencer will start in Saturday's game against the Nets.