"I’m more just mad at myself for getting too caught up in the record and not caught up enough in the sprint finish," the former BYU runner said about taking second in the Houston Half.

Ryan Hall's American record in the men's half marathon is no more. Conner Mantz runs 59:17 at the Houston Half for a new U.S. all-time best

In a thrilling, nail-biting finish, Olympic marathoner Conner Mantz shattered the long-standing American record in the half marathon, running 59:17 Sunday morning in Houston. The time betters Ryan Hall’s mark of 59:43,

Conner Mantz made history Sunday by besting an American running record that had stood for 18 years. The former BYU runner finished the Houston Half Marathon in 59:17, 26 seconds faster than Ryan Hall’s 59:43 from 2007.