Heavyweight contender Tomasz Adamek was to face Tony Grano in the main event Aug. 3 at Mohegan Sun in Uncasville, Conn. But Grano pulled out with a back injury and Adamek will now face former contender Dominick Guinn in the main event (on NBC Sports Network).
Houston’s Guinn, 38, is 34-9-1 with 23 knockouts. He has lost three of his past four bouts. Adamek, 36, is from Jersey City, N.J., via Poland. The former light heavyweight and cruiserweight champion has a record of 48-2 with 29 knockouts. Among his victories was one over Chris Arreola in April 2010 at Citizens Business Bank Arena in Ontario.