After missing cashing in the first two PBA50 Tour tournaments of 2017, Brian Kretzer found his form this week and led qualifying at the PBA50 Race City Open presented by Columbia 300 Tuesday at George Pappas’ Victory Lanes in Mooresville, N.C. Kretzer, who has one title on both the PBA Tour and PBA50 Tour, rolled games of 226, 226, 237, 257, 255, 226, 205 and 269 in Tuesday’s second round on the PBA50 Scorpion pattern to move up from second after Monday’s first round....