NEW YORK — Mike Trout of the Los Angeles Angels became the youngest American League Rookie of the Year on Monday and Bryce Harper of the Washington Nationals was voted the second-youngest winner of the National League honor.

Trout, who turned 21 on Aug. 7, received all 28 first-place votes from the Baseball Writers’ Association of America’s AL panel. The center fielder was the eighth unanimous AL pick and the first since Evan Longoria in 2008.