PHOENIX — Justin Upton is having a family reunion in Atlanta. Arizona traded its star right fielder to the Braves on Thursday in a seven-player deal that sent former All-Star infielder Martin Prado to the Diamondbacks. For the first time since he was a high school freshman, Upton will have older brother B.J. Upton as a teammate.The brothers combine with Jason Heyward, who won a Gold Glove in 2012, in an outfield potentially packed with power and speed.