Justin Irvin Upton (born August 25, 1987) is an American professional baseball outfielder who is currently a free agent. Nicknamed "J-Up", he has previously played in MLB for the Arizona Diamondbacks, Atlanta Braves, San Diego Padres, Detroit Tigers, Los Angeles Angels, and Seattle Mariners. He has been a teammate of his brother B. J. Upton with both the Braves and the Padres. While primarily a right fielder throughout his career, Upton has since transitioned to left field for the Braves, Padres and Tigers.