"Dan Uggla and the Braves agreed to a five-year, $62 million extension that will give him the highest average salary ever for a second baseman and keep him under contract through 2015, three sources close to negotiations said.

The sides agreed to terms Tuesday night on the deal, which covers Uggla's final year of arbitration in 2011 and what would have been his first four years of free agency. It's expected to be announced Thursday, after he passes a physical.

Uggla averaged nearly 31 home runs and 93 RBIs in five seasons with the Marlins, including career-highs of 33 homers and 105 RBIs in 2010 to win the Silver Slugger award as best-hitting second baseman in the National League.

He also set personal bests in average (.287), on-base percentage (.369) and on-base-plus-slugging percentage (.877) in 2010, with a .508 slugging percentage that was six points off his best. His statistics would have led the 2010 Braves in homers, RBIs, slugging and OPS.

Uggla is a .263 career hitter with 154 home runs and 465 RBIs — the most homers ever for a middle infielder in his first five seasons, and the second-most by any National League right-handed hitter in the past five seasons, behind Albert Pujols.

The Braves got him in a Nov. 16 trade for infielder Omar Infante and rookie left-handed reliever Mike Dunn. Atlanta general manager Frank Wren and Uggla both said right after the deal that they wanted to work out a long-term extension and believed they would. They were correct.

Negotiations went smoothly over the past four weeks, with a break for Christmas."