The Reds lost two left handed arms from the active roster Friday.
Tony Cingrani, replaced in the starting rotation by the return of Mat Latos, will go back to a starting role with the Reds Triple A team in Louisville after a short stint in the Reds bullpen. The Reds called up relief pitcher Jumbo Diaz to take his spot in the bullpen.
The team also announced Sean Marshall will have shoulder surgery Tuesday. Once considered the team's top left-handed set-up man, Marshall has battled arm injuries for a couple seasons.
Diaz will be making his major league debut after 12 seasons in the minor leagues. In 30 appearances with Louisville, Diaz had a 1.35 ERA and converted 18 of 19 save opportunities.
The Reds start a weekend series with Toronto Friday night at Great American Ball Park.
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