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12/3/2013 12:14 A.M. ET

A's acquire Baltimore closer Jim Johnson for infielder Jemile Weeks

Orioles also receive a player to be named later

OAKLAND, Calif. -- The Oakland A's have acquired Baltimore Orioles closer Jim Johnson in exchange for infielder Jemile Weeks and a player to be named later, it was announced by the club this evening. 

Johnson, 30, has saved a Major League-leading 101 games over the past two seasons. He was 3-8 with 50 saves in 59 opportunities and a 2.94 ERA in 2013. The 6-6, 240-pound righthander posted a 2-1 mark with a club-record 51 saves in 54 opportunities and a 2.49 ERA in 2012 for the Orioles, earning an American League All-Star selection and the AL Rolaids Relief Man Award. He led the majors in saves in both 2012 and 2013

Pitching parts of six seasons with Baltimore, Johnson owns a 18-26 record and 3.11 ERA. He garnered 122 saves in 150 opportunities. 

Weeks, the A's first-round selection in the 2008 First-Player Draft, batted .271 with 19 doubles, 10 triples, four home runs and 40 RBI in 130 games for Triple-A Sacramento last season and tied for the team lead in stolen bases with 17 in 19 attempts. A September call-up in 2013, the switch-hitting infielder hit .111 (1 for 9) in eight games with Oakland. He played parts of the past three seasons with the Major League club. His best season came as a rookie in 2011 when he batted .303 with 26 doubles, eight triples, two homers and 36 RBI while stealing 22 bases in 97 games.

This story was not subject to the approval of Major League Baseball or its clubs.