PHOENIX - Justin Upton is joining older brother B.J. Upton in a new-look Braves outfield he expects to be called the best in baseball.
He said he's not willing to endorse that label until it is proven in 2013.
Arizona traded Justin Upton to Atlanta in a seven-player deal Thursday that sent former All-Star infielder Martin Prado to the Diamondbacks.
The Upton brothers join right fielder Jason Heyward, who won a Gold Glove in 2012, in the outfield packed with power and speed.
"If we push ourselves to the next level, I feel with the extra push from each other, there's no question we can be the best outfield in baseball," Justin Upton said in a telephone interview. "I'm not going to give us that label until we prove it."
The Braves, who also get third baseman Chris Johnson, are giving up one of their top pitching prospects, Randall Delgado, and three minor-leaguers - right-hander Zeke Spruill, shortstop Nick Ahmed and first baseman Brandon Drury.
Prado, projected to play third base for the Diamondbacks, can become a free agent after this season.
B.J. Upton, 28, signed a five-year, $75.25 million contract with Atlanta in November. Justin Upton, 25, said the brothers will be on the same team for the first time since he was a freshman in high school.
Upton said he already receives tips after his older brother sees him on TV. He said now there will be more chances for the two to help each other.
"I think from that standpoint it will be good, but I think more than anything being able to show up at the ballpark genuinely excited every day and have that energy," he said.
Prado, who joins fellow Venezuelan Miguel Montero in Arizona, made the All-Star team in 2010 as a second baseman and played mostly in left field last season. Prado was projected to move to third base for the Braves this season to replace the retired Chipper Jones.
Diamondbacks president Derrick Hall said via Twitter that the team wants to sign Prado to a long-term deal.
"This is the type of player we want in our lineup," he wrote.
Arizona had accumulated a glut of outfielders, signing Cody Ross as a free agent last month. Upton, an All-Star pick in 2009 and 2011, was the most marketable.
Delgado, a 23-year-old right-hander, bolsters the young pitching depth in Arizona depleted by the trade of Trevor Bauer.
• Martin Prado, 3b/of
• Randall Delgado, rhp
• Zeke Spruill, rhp
• Nick Ahmed, ss
• Brandon Drury, 1b
• Justin Upton, of
• Chris Johnson, 3b