Scott Greiner credited his ball choices for a big second round that pushed him into the lead as qualifying ended Thursday at the PBA50 River City Extreme Open presented by Ebonite at River City Extreme in Monticello, Minnesota. The left-hander from Sunrise Beach, Missouri, rolled games of 231, 247, 223, 182, 246, 245, 249 and 237 for 1,860 in the second and a 16-game total of 3,626 (226.63 average) on the PBA Don Carter 39 lane pattern. “I made all the right ball choices in the second...