Head coach Tom Izzo indicated Tuesday that Richardson is dealing with a sprain and is expected to be out a few days, Jim Comparoni of Rivals.com reports.
Williams (shoulder) ended Wednesday's 74-63 victory over Merrimack with two points (1-4 FG), two rebounds, one assist and three steals across 19 minutes.
Derkack provided six points (1-2 FG, 0-1 3Pt, 4-4 FT), six rebounds, nine assists and two steals over 30 minutes during Friday's 98-81 victory over Monmouth.