Cubs catcher Willson Contreras earned a strong rebuke from his manager after standing to watch a would-be home run in Sunday's game against the Reds at Wrigley Field.

Pinch-hitting in the fifth inning, Contreras hit a ball to dead center field. The 26-year-old thought it was going to be a game-tying homer, failing to run as he admired his work. The ball hit the wall and Contreras had to sprint, barely making it safely to second base for a double.

"Horrible," Maddon said. "I didn't like that at all. Not at all. And that will be addressed. The whole team didn't like that."

Contreras expressed his remorse for pimping the potential homer and acknowledged that he let down his teammates.

"Thank God I was able to run hard and make it to second base because what I did was not good for baseball," Contreras said.

“It was bad," Contreras added. “I’m embarrassed with myself.’’

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Contreras apologized to Reds pitcher Luis Castillo after the incident, something rarely seen in today's game.

"I said, 'That was my fault, I shouldn't do that,'" Contreras said. "He's a nice guy and the next time I get to see him personally, I will talk to him about it. I think there's no hard feelings."

Contreras was a National League starter in All-Star Game, but has struggled in the second half, batting .225 with a .646 OPS. He has come off the bench in two of the past three games.