SEATTLE – Demetrious Johnson , Melvin Guillard , Ed Herman and Trevor Smith each earned $50,000 bonuses for their performances at Saturday’s UFC on FOX 8 event. Johnson won “Submission of the Night,” Guillard earned the “Knockout of the Night” and Herman and Smith picked up “Fight of the Night” honors. UFC officials announced the winners at the night’s post-event news conference, which MMAjunkie.com (www.mmajunkie.com) attended. UFC on FOX 8 took place at KeyArena in Seattle. The main card aired on FOX following prelims on FX and Facebook. Johnson (18-2-1 MMA, 6-1-1 UFC) dominated John Moraga (12-2 MMA, 2-1 UFC) with 11 takedowns into the fifth round, but the flyweight champion continued to go after submissions. Deep in the fifth, Johnson went after an armbar and got it, forcing Moraga to tap with just 1:17 left in the fight for the latest submission in UFC history. Guillard (31-12-2 MMA, 12-8 UFC) needed to rebound in a big way after back-to-back losses and four setbacks in his past five fights.