Randall was 6 of 12 from the field for the Chippewas (9-8, 2-2 Mid-American), who used a 13-2 run just after halftime to turn a 41-35 deficit into a 48-43 lead and never trailed again. CMU improved to 5-1 at home.
Majok Majok had 14 points and 11 rebounds, his seventh double-double of the season, for the Cardinals (7-9, 1-3), who had won the previous five meetings between the schools and had never lost at McGuirk Arena. Jauwan Scaife chipped in 13 points.
Ball State took a 37-35 lead into halftime but went cold in the second half, going just 9 of 26 from the field and 1 of 13 from 3-point range. Central Michigan turned 17 Cardinals turnovers into 15 points for the game.
Oklahoma basketball coach Lon Kruger has hired Carlin Hartman as an assistant.
Authorities say former Michigan State basketball player Keith Appling has been charged with carrying a concealed weapon and other crimes.
Point guard Jaylen Fisher, who reopened his recruitment after coaching changes at UNLV, has committed to TCU over a long list of schools.