This was Oh's first appearance since the season opener the previous Sunday. He hadn't been in a save situation with the Cardinals losing three in a row and then beating the Reds 10-4 on Saturday.

Oh took the mound in the top of the ninth with the Cards down 7-0. The South Korean right-hander got Jose Peraza to pop out to shortstop to open the inning, but then Joey Votto drove a 1-0 slider over the right field wall to pad the Reds' lead.

Oh was touched for a three-run shot against the Chicago Cubs in his season debut. The second-year big leaguer allowed just five home runs all of last season and never did so in back-to-back games.

The first home run off Oh last year came on May 25, and he didn't give up his second long ball until July 22.

After Votto's home run, Oh allowed a walk and a single, before retiring the next two batters on pop flies.

Oh now has a 13.50 ERA in 2 2/3 innings this season. He posted a 1.92 ERA in 79 2/3 innings in 2016. (Yonhap)