Andrew Luck is retiring from the NFL at age 29 because he is 'mentally worn down'

• Andrew Luck is retiring from the NFL, according to Adam Schefter of ESPN.
• Schefter reports that Luck is "mentally worn down, and now checking out."
• Luck's season appeared to be in jeopardy with a leg injury.
• Schefter reports that Luck has already informed the Colts of his decision and an announcement will be made on Sunday.
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Andrew Luck is retiring from the NFL, according to Adam Schefter of ESPN.

"Andrew Luck has informed the Colts he is retiring from the NFL, per source," Schefter wrote on Twitter. "There will be a press conference Sunday to make it official, but Luck is mentally worn down, and now checking out."

This is a developing story.

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