Right-hander Jose Arredondo notched two outs but couldn't close out the game. He walked two batters on full counts before left-hander Sean Marshall was summoned to face lefty hitter Jason Heyward, who flied out to end it.
"Arredondo got two quick outs but tried to rush for the third one," Reds manager Dusty Baker said. "That's what happens sometimes. That last out is something, because you can tell."
Marshall, who lost the title of closer on Sunday, has faced two batters in the last two games -- both lefties. But he got the job done both times.
"That was the best matchup at the time, and it happened to be the last out," Baker said of Monday's situation. "We're going to have to do some things you wouldn't normally do to save ballgames and stay in ballgames. We would have loved to have had Chapman last night, but we didn't."