Derrick Lewis finished a stacked UFC Vegas 19 with an exclamation point, taking out Curtis Blaydes in a main event that followed a night full of finishes. UFC Vegas 19 results: Derrick Lewis lands record-tying knockout on Curtis Blaydes Derrick Lewis was ranked No. 4 in the UFC heavyweight division coming into Saturday night. He will move up at least one spot after blasting No. 2 ranked Curtis Blaydes….