An Orange Park man could not be revived after he was found in a swimming pool Tuesday night, the Clay County Sheriff's Office said. Cornelius Mayo, 42, of Tower Oaks Drive was found unresponsive at the Plantation Oaks Athletic Center on Oakleaf Plantation Parkway about 10:15 p.m. The Sheriff's Office does not suspect foul play in the drowning. Investigators plan to release more details Wednesday morning.