Dunn -- who has homered in four straight games -- belted a solo homer in the bottom of the fourth inning one day after his game-winning three-run blast in the ninth Saturday gave Cincinnati a 4-2 victory. Votto launched a two-run pinch homer in the sixth.
Cleveland got one RBI each from four players, including Michael Aubrey, who hit a solo homer in the sixth.
Winner Edinson Volquez (7-1) yielded two earned runs and four hits in six innings with four walks and five strikeouts.
Losing pitcher Cliff Lee (6-1) surrendered six runs -- five earned -- and 10 hits in 5 2/3 innings.