Andre Petroski showed who the superior prospect was on Saturday night. The recent The Ultimate Fighter contestant improved to 3-0 in the UFC with a first-round anaconda choke submission of Nick Maximov to open the UFC Vegas 54 preliminary card at UFC APEX in Las Vegas. Petroski’s choke actually left Maximov unconscious before referee Chris Tognoni stepped in for the stoppage just 76 seconds into Round 1. Watch the slick submission finish above. In what was expected to be a battle of grappling specialists, it was Petroski who won a scramble to set up the fight-ending maneuver. Petroski, now 8-1…