COLORADO SPRINGS, Colo. (AP) — Two-time Olympic silver medalist Sarah hammer will anchor the U.S. team in track cycling at the Rio Games, contesting the omnium before joining the gold medal-contending women's pursuit squad.

USA Cycling announced the first six members of its roster Friday.

Hammer recently won bronze in the omnium at the world championships, and joined with Kelly Catlin, Chloe Dygert, Jennifer Valente and Ruth Winder in winning team pursuit gold. That same quartet will try to replicate its efforts in Rio this August.

Matt Baranoski will represent the U.S. in the keirin.

The only selection that remains is in the men's omnium, where 2012 Olympian Bobby Lea is awaiting an arbitration ruling in his doping case. The selection must be made by April 1.