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By Jon Weisman

Relief pitcher Jim Johnson, whom the Dodgers acquired with Alex Wood and Jose Peraza from Atlanta in July, has been designated for assignment.

Taking his place on the 40-man roster — not eligible for the current playoffs — will be right-handed pitcher Brooks Brown.

A first-round (34th overall) pick by Arizona in the 2006 draft, the 30-year-old Brown had a 3.97 ERA with 41 strikeouts against 75 baserunners in 59 Major League innings for Colorado in 2014-15. He had a 2.77 ERA in 2014, then a 4.91 ERA in this year while dealing with right shoulder inflammation.

Johnson did not make the Dodgers’ postseason roster after allowing 42 baserunners in 18 2/3 innings with 17 strikeouts for Los Angeles.