The event is scheduled for January 26 from the United Center in Chicago. The main event will feature Demetrious Johnson defending his UFC flyweight title against former Ultimate Fighter winner John Dodson.
Grant (19-5) has won three consecutive fights since moving down from welterweight, including a recent victory over Evan Dunham.
Wiman (15-6) is on a two-fight win streak, the second of which netted him Submission of the Night honors when he tapped Paul Sass.
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