Tim Hudson is expected to sign a three-year contract extension with the Braves by the end of this week, according to major-league sources. "It will be a shocker if something doesn't get finished in the next three or four days," one source said. The re-signing of Hudson could lead the Braves to trade another of their starting pitchers ? most likely right-hander Javier Vazquez or right-hander Derek Lowe ? for a hitter. Vazquez, 33, is signed through next season for $11.5 million. Lowe, 36, has three years left on his deal at $15 million per season.