After more than a week with no explanation for Hall's withdrawal, his agent John Regis told LetsRun.com that he will not compete at USAs due to a hamstring injury. Hall could theoretically still make it to Worlds by winning the DL title. *MB: USATF Entries are Closed and the biggest name missing is Olympic champion Quincy Hall

Quincy Hall did not enter USAs by the entry deadline Tuesday at midnight.

Hall's time ranks him #4 all-time and silver medalist Matthew Hudson-Smith's 43.44 is #5 as an American outkicked a Brit for gold in Paris for the second straight night.