Derek Lowe could only stare at his foot in disbelief. Longtime Braves manager Bobby Cox said he had never seen anything like it. Lowe was hampered Wednesday by a blister on his right foot, forcing him out of Atlanta's 7-6 victory over the New York Mets after just one inning. Lowe said the recurring blister on his push-off foot popped with Daniel Murphy at the plate, after he had faced two…