Straight No Chaser (h, 5, Speightster--Margarita Friday, by Johannesburg), unraced since posting a powerhouse, front-running victory in the GIII Maryland Sprint S. on last spring's GI Preakness S. undercard, is on the comeback trail for trainer Dan Blacker. After stopping the clock for six furlongs in a razor sharp 1:08.27 and earning a career-best 107 Beyer Speed Figure in that 7 1/2-length decision at Pimlico, an undisclosed party agreed to purchase a minority interest in the MyRacehorse colorbearer. The deal, however, was called off after a positron emission tomography (PET)...