He moved into a tie for ninth all - time in the 400 in school history .
Cundiff overcame a severe ankle injury nearly a year and a half ago to finish in sixth in the preliminaries with a personal best time of 50.99 .
Cundiff moved into a tie for ninth all - time in the 400 in school history .
Cundiff overcame a severe ankle injury nearly a year and a half ago to finish in sixth in the preliminaries with a personal best time of 50.99 .