LONDON (AP) -- Michael Phelps ends his swimming career with another gold medal, helping the U.S. win the medley relay at the London Olympics.
It's his fourth of the Games, to go along with two silver.
Phelps leaves the sport with a record 18 golds and 22 medals overall.
Earlier in the pool, the U.S. set a world record while winning the women's medley relay.
Seventeen-year-old Missy Franklin swam the leadoff backstroke leg, Rebecca Soni the breaststroke, Dana Vollmer competed in butterfly and Allison Schmitt had the anchor leg in freestyle.