Phoenix, AZ (Best E Casino) - The Arizona Diamondbacks optioned left-handed pitcher Doug Slaten to Triple-A Tucson on Sunday and recalled right-hander Billy Buckner.

Buckner was optioned to Tucson when Slaten was activated from the disabled list on August 13.

Slaten is 0-3 with a 4.30 earned run average in 38 appearances this season.

Buckner, in his first year in the Diamondbacks organization, is 1-0 with a 4.00 ERA in nine innings over six games. It is his third stint with the team this season.