Salvador Perez hit his third solo homer in two games for Kansas City, which took two of three at Fenway Park and got its 17th win in 21 games.
Colin Kaepernick chose not to stand during the national anthem at a 49ers game Friday night.
He was inducted into the WWE Hall of Fame in 2007.
The 49ers quarterback says he knows he could be cut for this stand, criticized and ostracized but he'll go it all alone if need be.
Endwell became the first U.S. winner since Huntingdon Beach, California, in 2011.