About three minutes in, Martin was setting a pick when he got tangled up with Justin Love of Saint Louis. Martin's ankle turned underneath him as he fell.
Martin was taken by ambulance to a nearby orthopedic clinic for X-rays and evaluation, and a release issued at halftime by conference officials said the senior broke his right fibula and also damaged ligaments.
Doctors will put a cast on his leg, and he will be returned to Cincinnati for surgery.
Martin was selected the conference's player of the year just a day before, and he is a finalist for national player of the year honors.
The 6-foot-9, 240-pound Martin led the league in scoring and rebounds with 19.5 points a game and 10 rebounds a game. He had the top field goal percentage (57 percent) and blocked shots (3.57). He is the career blocked shots leader for both Cincinnati and Conference USA with 292, and he set the single-season mark with 107 this year.
At the time of his injury, Saint Louis was up 7-5 and led 30-28 at halftime.
With Martin, Cincinnati set a regular season record with 28 victories. The Bearcats also turned in the first undefeated record in conference play at 16-0.
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