Part of the issue that had been slowing the completion of the deal was the discussion between the Red Sox and Kotsay over the assignment fee he was contractually expected to receive for going there. Under his contract, Kotsay was to receive money if he was traded. Red Sox general manager Theo Epstein and Kotsay's representatives talked into Tuesday night to resolve that issue.
The 12-year veteran is batting .289 with six home runs and 37 RBIs this season. His on-base percentage is .338, compared to .319 for Red Sox center fielder Coco Crisp, who is batting .257.
A move for Kotsay could be in response to earlier news on Tuesday that right fielder J.D. Drew was heading to the disabled list with a lower back strain. The All-Star was batting .289 with 19 homers and 64 RBIs.
ESPN.com's Keith Law reported the player going back to Atlanta in exchange for Kotsay is 19-year-old outfielder Luis Sumoza, who is currently playing for Class A Lowell (Mass.).
Buster Olney is a senior writer for ESPN The Magazine.