MILWAUKEE, WI (LEARFIELD-WSAU) Milwaukee amateur kick-boxer Dennis Munson died over the weekend, just a few hours after he competed in a Friday night bout. The 24-year-old Munson collapsed in the ring, right after he lost a three-round bout to Mike Vang. He received oxygen before going to a hospital where he died. The Milwaukee County medical examiner's office has not said what caused the death. A witness told BloodyElbow-Dot-Com that Munson appeared "out of sorts" going into the third round. But a chief sponsoring official said the referee spoke to Munson and determined he was not in danger.