This week’s Battlegrounds MMA event in Oklahoma has seen some late changes and additions. David Mitchell  (13-4) has been forced out of the single-night, eight-man welterweight tournament. Stepping in for him is  Randall Wallace (9-2). In addition,  Jonny Carson (11-6) now will meet  Danny Navarro (11-4). Carson was set to meet Ryan Couture , but Couture recently signed with Bellator MMA and had a successful debut with that promotion.