Newcomer Cottrell Makes UFC Debut in Chicago

With Tony Martin forced out of his July 23 bout against Michel Prazeres due to injury, Oklahoma City newcomer JC Cottrell has stepped up to make his first Octagon walk at United Center in Chicago to face Brazil's "Tractor."In the UFC on FOX main event, former UFC women’s bantamweight champion Holly Holm faces rising star Valentina Shevchenko, and in the co-featured bout, lightweight contenders Edson Barboza and Gilbert Melendez collide.Winner of 17 of his 20 pro bouts, the 26-year-old Cott