Lyles didn't run in the heats for the event as he prepared ... If Noah Lyles doesn't run in 4x100m relay, who will compete for Team USA?

Despite winning his eighth gold medal for Team USA in the 4x100m freestyle relay ... good enough for fifth in his semifinal heat. The top three swimmers from each of the two semifinal heats ...

The world champion United States men's 4x100m relay team will not compete ... teams to the final out of Thursday's preliminary heats. Disappointment in the 4x1 relay is a familiar feeling for Team USA ...

Torri Huske, Regan Smith, Lilly King and Gretchen Walsh win gold in the women's 4x100m medley relay and set a new world record. Team USA finished 3.48 seconds ahead of Australia.

Yahoo Sports' Missy Franklin, a five-time Olympic Gold Medalist, recaps the intense women's 4x100 freestyle relay, where Australia's dominant performance earned them Gold and Team USA grabbed Silver.

The Americans have won gold in 11 of the last 14 editions of the men's 4x100m free relay at the Olympics ... Armstrong and Guiliano get back in the pool as soon as Sunday, with heats and semifinals in ...

9:25 AM HS Girls' 4x800m Relay Large Schools (heats) 9:50 AM HS Girls' 4x100m Relay (heats) 5:35 PM College Women's 400m Hurdles 5:55 PM College Men's 400m Hurdles 6:15 PM College Women's 1500m 6: ...