On Tuesday at Philadelphia, he blew a two-run lead by giving up a game-tying two-run homer to Maikel Franco in the eighth inning before a loss. In Saturday's 9-7 defeat to the Padres, Diaz was the losing pitcher after allowing a leadoff double, a pair of two-out walks to load the bases and Matt Kemp's go-ahead two-run single in the eighth.
The Reds' bullpen, which entered Sunday ranked 14th out of 15 National League clubs in ERA, blew four leads in the six games before the roster move.