According to CBSSports.com's Jon Heyman, Atlanta will receive lefthander Max Fried, shortstop Jace Peterson, third baseman Dustin Peterson and outfielder Mallex Smith. An unnamed player will go to San Diego in the trade.
The Padres have been active this offseason. In addition to trading for Upton, the team acquired All-Star outfielder Matt Kemp in a five-player deal with the Los Angeles Dodgers, outfielder Wil Myers from the Tampa Bay Rays in a three-team swap and catcher Derek Norris from the Oakland Athletics.
The Padres finished the 2014 season ranked last in MLB in team batting average, runs scored, hits, on-base percentage, slugging percentage and OPS.
Upton batted .270 with 29 home runs and 102 RBIs in 154 games last season for the Braves, who had a 79-83 record and finished tied for second place in the National League East.
Upton, 27, is a career .274 hitter with 164 home runs and 535 RBIs in seven major league seasons with the Braves and Arizona Diamondbacks, who selected him first overall in the 2005 draft. He is owed $14.5 million in the final season of a six-year contract worth $51.5 million.
- Scooby Axson