LaShawn Merritt anchors the Americans in the final leg of the race
The U.S. wins its sixth straight gold medal in the 4x400m relay
More history is made in Rio as the Americans get another gold medal
Leyva seized his chance and made the most of it
Moments after winning a medal, He Zi said 'yes'
Castillo, who signed a $72 million contract last year, is considered a top-25 prospect by Baseball America.