Arizona activates reliever Slaten, option Buckner

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DENVER (AP) -- The Arizona Diamondbacks activated left-hander Doug Slaten from the 15-day disabled list Wednesday and optioned right-hander Billy Buckner to Triple-A Tucson.

Slaten was placed on the disabled list July 19th with a strained right knee. He made four rehab appearances for Tucson, allowing three runs, five hits and three walks in 3 2-3 innings of relief.

In 36 games for the Diamondbacks this year, Slaten is 0-3 with a 4.55 ERA.

Buckner was recalled July 19th and appeared in four games for Arizona. He allowed two runs and eight hits, striking out five and walking two in 6 1-3 innings of relief.