The Cubs and Braves are working on a deal to send first baseman Derrek Lee to Atlanta for prospects, according to a league source. The teams are "way along in the process" and the deal could be completed within a day, a source told ESPN.com's Jerry Crasnick. The issue remaining between the teams, according to the source, is more about what the Cubs are willing to accept in return and less about Lee's willingness to accept the trade. He is in the final year of a five-year, $65M deal with the Cubs.