UFC lightweight Melvin Guillard (30-12-2 MMA, 11-7 UFC) has a lot on his mind leading into his next fight, and it’s not about his departure earlier this year from the Blackzilians MMA team in Florida. Guillard’s grandmother passed away on Monday, and he said his sister is scheduled to have brain surgery four days after this weekend’s UFC on FOX 8 event, where he faces Mac Danzig (30-12-2 MMA, 11-8 UFC) on the event’s FX-televised preliminary-card at KeyArena in Seattle. Win or lose at the event, Guillard will fly to Florida to reunite with his wife, whom he hasn’t seen since April, and then go to New Orleans to see his sister through her procedure. Guillard said he remains focused despite recent challenges and said he’s dedicating his fight to his family. “Those things only make me stronger,” he told MMAjunkie.com Radio (www.mmajunkie.com/radio). It’s been a tough year for “The Young Assassin,” who left the Blackzilians after back-to-back losses in the octagon. He was then blocked from returning to his former team at Jackson-Winkeljohn’s MMA and went to court on a pair of assault charges from 2010. In April, Guillard moved into the basement of a fighter house at the Grudge Training Center in Wheat Ridge, Colo., to get his career back on track