He averaged 9.6 points and 6.9 rebounds last season, his only one in Oxford after two years in junior college.
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He ranked ninth in the nation with a school-record 236 assists, and only three Division I players had more than his 91 steals.
Ringo posted a double-double (10 points, 10 assists) in an overtime win against Wright State in November.
The RedHawks went 16-18 in their first season under head coach Jack Owens, a former Purdue assistant.
Earlier this offseason, Miami also lost center Darius Harper.
The Springfield native left the team after deciding to pursue a football career instead.