Bryce Harper, Under Armour Agree to New Contract: Latest Details and Reaction

Washington Nationals superstar Bryce Harper has signed a contract extension with Under Armour, per a press release from the company.

According to Darren Rovell of ESPN.com, the deal is a 10-year contract extension "that is believed to be the largest endorsement deal in history for a baseball player, a source with knowledge of the deal told ESPN."

You can follow Timothy Rapp on Twitter.

Read more MLB news on BleacherReport.com