Trainer Patrick Swan saddles Ganzumacher (#3, ML 3-1) in Friday’s sixth race at Prairie Meadows, a six-furlong claimer. Since Jan. 1, 2014, Swan is winning at a 31 percent clip in sprint races, for a return on investment of $11.03. Check out the Positive ROI report as part of DRF Plus. Sign up for DRF Plus here.