BOSTON- The Boston Red Sox reinforced their bullpen Wednesday, acquiring right-hander Mark Melancon from the Houston Astros in exchange for infielder Jed Lowrie and right-hander Kyle Weiland, according to a major-league source.

The addition of Melancon likely will be one of multiple additions the Red Sox make to their bullpen this offseason. The team is talking to the Oakland Athletics about a trade for closer Andrew Bailey, and still could pursue free-agent closer Ryan Madson.

The Red Sox lost free-agent closer Jonathan Papelbon to the Philadelphia Phillies last month, and are planning to move right-hander Daniel Bard from the bullpen to the team's starting rotation.

The trade of Lowrie leaves Marco Scutaro and Jose Iglesias as the Red Sox's alternatives at shortstop.

Melancon, 26, went 20-for-25 in save opportunities with a 2.78 ERA last season. He began his career with the New York Yankees in 2009.

The Astros plan to use Weiland as a starter and likely will make Lowrie their starting shortstop.

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