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Milwaukee — The Chicago Cubs have selected the contract of right-hander Anthony Bass from Triple-A Iowa, adding a fresh arm to the bullpen.

Righty Cory Mazzoni, who allowed one run in two innings in a 7-1 loss Sunday to Pittsburgh, was optioned to Triple-A. Right-hander Eddie Butler, who is sidelined by a strained right groin, was transferred to the 60-day DL.

The Cubs announced the moves Monday before the opener of their three-game road series against the Milwaukee Brewers.

More: Decade after being drafted, Anthony Bass earns degree from Wayne State

Bass, a Trenton native and Wayne State alum, was 0-1 with a 2.28 ERA in 18 games at Iowa, converting three of four save opportunities.

Bass is 5-9 for his career with a 4.60 ERA in the majors. He had previous stints with the Padres, Astros and Rangers.