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ENGLEWOOD, Colo. — Broncos quarterback Brock Osweiler took to Instagram on Monday morning to offer his thanks to Peyton Manning, who is announcing his retirement on Monday.

Osweiler started seven games in place of Manning during the 2015 season as Manning recovered from torn plantar fascia in his left foot. Osweiler, who is a free agent, led the Broncos to a 7-2 record.

In the Instagram post, Osweiler said he will “be forever grateful for the four seasons that Peyton and I shared together in Denver.”

The Broncos reportedly have offered Osweiler a three-year contract worth $45 million in hopes he will replace Manning on the Super Bowl-winning team.

https://www.instagram.com/p/BCqMT4TJTNk/

“I will be forever grateful for the four seasons that Peyton and I shared together in Denver. Peyton’s attention to detail, how he went about his preparation and his desire to win football games is what I will remember most. Peyton displays how to be the ultimate pro every single day. I am a better football player today because o my time spent with him. I congratulate him on a Hall of Fame career and wish him continued success in the future.”