Star MLB outfielder who was named 2015 National League MVP after hitting .330 with 42 home runs for the Washington Nationals. He was named NL Rookie of the Year in 2012 and helped lead the Nationals to the playoffs in 2012, 2014, 2016 and 2017. In 2018, he signed with the Philadelphia Phillies.
He played collegiate baseball at the College of Southern Nevada and became a top amateur prospect.
At the age of nineteen, he became the youngest player to ever be selected for an MLB All-Star game.
His older brother, Bryan, also became a professional baseball player. He married his high school sweetheart Kayla Varner in December 2016, and the couple welcomed a son named Krew in 2019. In November 2020 they welcomed their second child, daughter Brooklyn Elizabeth Harper.
He became teammates with star pitcher Stephen Strasburg on the Nationals in 2012.