The women's 4x400 just became the most exciting event in this year's Olympics. The US can field a team in which the slowest leg is 6 time Olympic medalist Alyson Felix. If I were picking the team I would run Felix on the scratch leg, Mohamed on leg 2, McLaughlin on leg 3 and anchor with the best frontrunner in the world, 800 meter Champion Athing Mu. Mu has the 4th fastest time in the world this year in the 400 [49.57] and has run well sub 49 on a relay leg. The winning time in the 400 at the trials was 49.78. The only reason I would have Felix in the race instead of Quanera Hayes [who won the trials] is to give her the chance to win a 7th medal and tie Carl Lewis for the most in a career by a US athlete. Of course, Felix can run a leg in the prelims and get a medal, so I might run Hayes on the scratch leg instead of Felix in the final. Mohamed, McLaughlin and Mu are all capable of running low 48's or high 47's on their legs. If those three run with either Hayes or Felix, the US could well set a new World Record. Even if the US has a bad [for them] first 2 legs, McLaughlin is the best finisher in the world when coming from behind, and if Mu gets the baton in first, no one in the world will catch her.