OAKLAND, Calif. -- The Oakland Athletics have acquired AL saves leader Jim Johnson from the Baltimore Orioles for infielder Jemile Weeks and a player to be named.
The teams announced the trade Monday night.
The two-time AL West champions found their closer to replace All-Star Grant Balfour, who became a free agent after the season.
While general manager Billy Beane had confidence he could fill the ninth-inning duties from within, he was able to find Balfour's replacement via trade -- a common December practice for the GM and low-budget club.
The 30-year-old Johnson converted 50 of 59 save opportunities in 2013, going 3-8 with a 2.94 ERA. He was tied with Atlanta's Craig Kimbrel for the major leagues saves lead.
Johnson led the majors with 51 saves in 2012.
The Orioles also announced Monday night they tendered contracts to six of their arbitration eligible players: Matt Wieters, Chris Davis, Tommy Hunter, Bud Norris, Brian Matusz and Troy Patton.
They also re-signed Steve Pearce and Nolan Reimold for 2014, and cut ties with Eddie Gamboa and Jason Pridie.
The A's also fortified their rotation Monday, reaching a two-year, $22 million agreement with free-agent left-handerScott Kazmir, sources told ESPN's Jim Bowden and Buster Olney on Monday.
Information from The Associated Press was used in this report.