Richard Sherman, other players blast Colts fans who booed Andrew Luck

The NFL reacts to fans booing after Andrew Luck's shock retirement. The NFL reacts to fans booing after Andrew Luck's shock retirement. Photo: Twitter Photo: Twitter Image 1 of / 14 Caption Close Richard Sherman, other players blast Colts fans who booed Andrew Luck 1 / 14 Back to Gallery

Indianapolis Colts quarterback Andrew Luck's shocking retirement from the NFL was reported in the middle of his team's preseason game against the Chicago Bears on Saturday night, meaning fans at Lucas Oil Stadium learned of his exit with him still standing on the sideline.

As Luck was walking off of the field, a number of Colts fans could be heard booing the franchise quarterback as he walked off the field.

Luck tearfully told reporters after the game he was retiring due to a number of injuries he sustained over the past four years, and said he'd be "lying" if he said he didn't hear the fans booing him.

"It hurt, I'll be honest, it hurt," he said of the fans.

A number of NFL players, both current and former, were not happy.

"This is a very rough game," San Francisco 49ers cornerback Richard Sherman tweeted. "Most people who have not played at this level will never understand what we put our bodies through season after season. We don't need the sympathy because this is what we signed up for, but to 'boo' a man that battled for that city is disgraceful."

FULL COVERAGE: Luck announces retirement following Colts loss to Bears

Chicago Bears tight end Trey Burton, who is currently recovering from sports hernia surgery, agreed with the 49ers defensive back.

"I was on the field when this happened," he tweeted. "These fans are so sad for doing this. Y'all have no clue how injuries affect players. Not everyone recovers the same."

Sherman was teammates with Luck at Stanford, and wished his friend the best going forward.

"Thank you Drew for everything you gave this game!" he wrote. "You are an amazing teammate and an even better friend. Wish you nothing but the best in your next endeavor. I know you will be even greater in your next chapter."

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Click through the slideshow above to see reactions to Colts fans booing Andrew Luck.

Eric Ting is an SFGATE staff writer. Email: eric.ting@sfgate.com | Twitter:@_ericting