Emilio Pagan (2-2) escaped a first-and-third, no-out jam for the victory. He had not pitched since since Wednesday.
Rookies Ryan Ritter and Yanquiel Fernandez provided the offense for Colorado.
Ritter, who played in his first big league game June 6, hit his first career home run with Fernandez on in the third inning. Fernandez had three hits, including an RBI double in the seventh inning.
Bradley Blalock pitched a season-high 5 2/3 innings, leaving with a 2-1 lead. Jimmy Herget left the bases loaded by striking out Benson in the sixth.
Brady Singer pitched 6 1/3 innings and tied his season high with nine strikeouts but avoided his fourth straight losing decision when the Reds rallied.
Key moment
Pagan struck out Brenton Doyle and Fernandez with runners on first and third and no outs in the ninth.
Key stat
Terry Francona reached 1,999 victories as a manager.
Up next
Colorado LHP Austin Gomber (0-2, 5.92 ERA) was to start Sunday against RHP Nick Martinez (6-9, 4.85 ERA).
___ AP MLB: https://apnews.com/hub/mlb
Credit: AP
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Credit: AP