Ian Happ took ownership.

Chicago Cubs right-hander Brad Keller had induced a pop-up from lefty Gavin Sheets to left field with one out and a runner on first in the sixth inning of Monday’s 10-4 loss to the Padres.

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It was a seemingly harmless bloop with a 3-1 lead for the Cubs – it had a .020 expected batting average, per Baseball Savant. Happ charged in from the outfield and third baseman Matt Shaw and shortstop Dansby Swanson raced out from the infield. Shaw veered off, but Happ and Swanson ran to it, then both stopped, allowing the ball to drop and putting runners on first and second with one out.

You probably know – or if not, you can guess – what happened next. The Padres went on to score twice and then took the lead in the seventh and continued to tack on in the win.

“That pop-up should have been caught,” Happ told reporters in San Diego after the game. “Down the line, was playing kind of more straight up, not as much towards the line, but yeah that’s a play where I’m looking for the other two guys and I should have put my head down and gone and got it.”

It was a sour note for Keller, who allowed two more hits in the frame – a 64.9-mph cue shot, infield single off the bat of José Iglesias with the bases loaded that trickled into no-man’s land. The second was a 93-mph grounder up the middle that just whizzed past Keller’s glove and caromed off Swanson’s at short, leading to another run.

“We had a bad night tonight. That’s how I see it,” Cubs manager Craig Counsell told reporters in San Diego after the loss. “Brad threw the ball very well and we missed an out there and then they got some fortune on their side and some luck on their side. That hurt us there and from there on we didn’t throw the ball great.”

Yes, the bullpen will garner much of the blame for this game – and rightfully so, they allowed eight earned runs on eight hits with six walks in 2.2 innings of work. But the defense had a pair of moments that could have led to three outs and, potentially, a different outcome.

Right-hander Nate Pearson allowed a single to Luis Arráez with a runner on an inning later, a ball that first baseman Michael Busch probably should have at the very least kept on the infield. Instead, it put two runners on and led to a three-run frame.

Pearson’s night ended after recording one out and allowing three runs on three walks and two hits. Counsell turned to Morgan, who allowed four runs on three hits and a walk before exiting with “some right elbow issues”. Counsell said they anticipate roster moves tomorrow.

The Cubs have five relievers in Iowa on the 40-man roster – righties Gavin Hollowell, Jack Neely and Daniel Palencia and lefties Luke Little and Tom Cosgrove. The Cubs also could move Justin Steele to the 60-day injured list and free up a 40-man spot to call up a pitcher who isn’t on it. Regardless of who is brought in, the Cubs know they can’t give teams like the Padres extra outs.

“Yeah, good team like that, you make a couple of mistakes and they’re going to capitalize on it,” Happ said. “Come back tomorrow and play a better baseball game.”