MIAMI – Undefeated Philadelphia Phillies right-hander Zack Wheeler ripped a fingernail putting on his pants, delaying his next start for two days and perhaps longer.Wheeler might lose the nail on the middle finger of his right hand.“Just one of those stupid things,” he said Friday. “I tripped a little bit, I lost my balance, and my jeans yanked out of my hand.”Wheeler, 4-0 with a 2.47 ERA in eight starts, had been scheduled to pitch Saturday in Miami.