The U.S. announced its Olympic 4x100 relay teams for the first round and there's no Justin Gatlin.
But don't read too much into the pairings for Thursday's race — teams don't always trot out their top lineup for the preliminary round.
Gatlin didn't make it out of the 200-meter semifinal the night before because of a nagging ankle injury. The final is Friday.
"I felt my ankle coming home. So I tried to hold on as long as I could... Couldn't get the job going to the finals (in the 200). But, I wish all my teammates going to the final, good luck," said Gatlin.
In partnership with NBC Sports Philadelphia
The U.S. men's 4x100 preliminary lineup will be: Mike Rodgers to Christian Coleman to Tyson Gay to Jarrion Lawson.
The women's lineup: Tianna Bartoletta — fresh off her gold in the long jump — to Allyson Felix to English Gardner to Morolake Akinosun.
The Jamaicans are also resting Usain Bolt for the first round of the Olympic 4x100 relay Thursday. He does have a 200-meter final to try and win later in the evening.
[Rio2016 - USMedals] Highest Honors: American Medalists at the Rio Olympics
So instead, the two-time defending champions will roll out Jevaughn Minzie, Asafa Powell, Nickel Ashmeade and Kemar Bailey-Cole.
The Jamaican women's squad looks like this: Simone Facey, Sashalee Forbes, Veronica Campbell-Brown and Shelly-Ann Fraser-Pryce.