- Associated Press - Sunday, July 20, 2014

PHOENIX (AP) - Things are going so badly for the Chicago Cubs, even a spectacular play backfires.

First baseman Anthony Rizzo tumbled over a railing and into a camera well to make a catch, but a rule allowed the go-ahead run to score from third and the Cubs lost to the Arizona Diamondbacks 3-2 on Sunday.

If a defensive player takes the ball out of play, runners are given an extra base. That sent David Peralta home from third.

Rizzo said it was “just instinct” that he lunged for the ball.

“I didn’t think I would go in (the camera well),” he said. “But it was a little farther then I thought.”

Cubs manager Rick Renteria was just glad Rizzo wasn’t hurt.

“You talk about the potential of injury. It was the freaking greatest effort,” Renteria said. “He always does that. “

The only run Arizona’s Josh Collmenter allowed was Rizzo’s 23rd home run of the season, matching his total for all of last year.

Collmenter (8-5) gave up just three other hits.

“I was able to command the fastball both sides of the plate,” he said. “With a lot of lefties in the lineup I was able to pitch in really well, got a lot of popups and ground balls and the defense made some great plays.”

Peralta had a run-scoring double to tie it, then came home from third on Rizzo’s camera well plunge.

The Diamondbacks earned their second sweep of the season, first at home.

The Cubs have lost 11 of 13 since Jeff Samardzija was traded to Oakland on July 5. Jake Arrieta (5-2), who had a stomach virus the past few days, allowed three runs and four hits in 6 2-3 innings for the Cubs.

“It was a tough series, tough game today,” he said. “The challenge really for me was what I had to deal with the last few days, trying to hold fluids down. My body was weak not being able to eat any solid food.

Addison Reed pitched a perfect ninth for his 23rd save in 28 tries.

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