HOUSTON – Roxanne Modafferi ’s farewell from MMA didn’t go as she wanted. “The Happy Warrior” lost a hard-fought split decision to top prospect Casey O’Neill in her retirement fight, 29-28, 28-29 and 28-29 on the judges’ scorecards. The women’s flyweight bout was part of the UFC 271 preliminary card at Toyota Center and aired on ESPN ahead of the night’s pay-per-view main card. Modafferi leaves the sport with her head held high despite the defeat