High School: Warner won the 110 hurdles at the 2009 WIAA 4A State Championships with a time of 14.23. He was also part of the 4x400 team which finished seventh with a time of 3:25.60. As a junior he finished third in the 110 hurdles with a time of 14.70. His best times were in the 100 (11.57), 200 (23.34), 110 hurdles (14.23) and 300 hurdles (39.28).