Saturday's men's 4x100m medley relay will provide a bit of Olympic history: it marks the final swim ever from Michael Phelps. And if all goes according to plan, he'll further his records with medal No. 22, and his 18th gold.
For the United States, here's the relay order they'll go with: Matt Grevers (back), the 100m backstroke winner, Brendan Hansen (breast), bronze medalist in 100m breaststroke, Phelps (fly) and Nathan Adrian (free), the 100m winner. Team USA, which had the fastest qualifying time (3:32.65) will likely be pushed by Great Britain, Japan and longtime rivals Australia.
It may not be much of a challenge for the Americans. After all, they have won this event in seven consecutive Olympics (their last time not getting gold was 1980).
The men's 4x100m medley relay is set to start at 8:27 p.m. in London, 3:27 p.m. ET.
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