Phillip Ervin hit a two-run homer to snap a tie in the seventh inning and had four RBIs in his first major league start as the Reds rebounded from blowing a nine-run lead to defeat the Chicago Cubs 13-10 on Thursday.
Ervin also had a single and double in four at-bats.
Joey Votto lofted a three-run homer in a nine-run, second-inning rally as Cincinnati raced to a 9-0 lead against Cubs starter Jon Lester on a warm day with the wind blowing out.
Ian Happ hit two solo shots and a sacrifice fly, and Alex Avila went deep and had three RBIs for the Cubs, who used six homers to erase a nine-run deficit for the first time since August 1989 versus Houston.
Drew Storen (4-2) pitched a scoreless sixth for the win, then Raisel Iglesias pitched the ninth for his 22nd save in 23 chances. Justin Grimm (1-2), who gave up Erwin's homer and was the second of five Cubs relievers took the loss.
Happ, Avila, Kris Bryant and Javier Baez homered in the fourth as the Cubs went deep four times in an inning for the first time since June 2008 to cut it to 9-6.
Kyle Schwarber homered to lead off the fifth, then Anthony Rizzo and Avila drove in runs with doubles against Michael Lorenzen to tie it at 9.
The Reds sent 13 men to the plate in the second. Eugenio Suarez and Ervin each had a single and a double in the eight-hit outburst.
Lester was pulled with left lat tightness with two outs in the inning and saw a doctor after the game.
Lester was charged with nine runs, seven earned, and was replaced by Mike Montgomery after facing 11 batters in the inning and Cincinnati leading 8-0.
After Chicago tied it 9-all in the fifth, Ervin put the Reds back in front 11-9 in the seventh. Happ's sac fly in the bottom half made it 11-10.The Reds added insurance runs in the eighth and ninth.
Jake Arrieta (12-8, 3.73) takes the mound against Toronto LHP J.A. Happ (6-8, 3.63) in the opener of a three-game set at Wrigley Field on Friday afternoon. Arietta is 5-2 with a 2.10 ERA in eight starts since July 2. Happ, 20-4 last season, has won three straight with a 1.45 ERA after getting off to a 3-8 start.