PITTSBURGH (KDKA) — Denver Broncos quarterback Peyton Manning is reportedly planning to officially announce his retirement on Monday, according to ESPN.

Chris Mortensen with ESPN tweeted Sunday morning, saying a “source familiar with [Manning’s] decision” told him the official announcement will happen Monday in Denver.

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CBS Sports NFL Insider Jason La Canfora reported Sunday morning that Manning informed the Broncos team president, general manager and head coach of his decision Saturday night.

The Broncos won the Super Bowl with Manning just last month, beating the Carolina Panthers 24-10. It was Manning’s second Super Bowl win, having won Super Bowl XLI with the Indianapolis Colts in 2007. Manning was with the Colts from 1998 to 2011 and has been with the Denver Broncos since 2012.