Matthew Centrowitz ran a personal best of 3:49.26 but missed Alan Webb's American record of 3:46.91. Centrowitz is the Olympic 1500m champion.
Kariem Hussein has been given a nine-month suspension for doping and will not take part in the Olympic Games Tokyo 2020 later this summer.
Jamaica track and field returned its first COVID 19 positive test, with reports claiming that jumper Carey McLeod tested positive and could miss Tokyo.
Watch live streaming coverage of the 2020 Tokyo Olympic Games opening ceremony on July 23. You can watch live on NBC and NBCOlympics.com.