Paul Allen, the co-founder of Microsoft and the owner of the Seattle Seahawks and Portland Trail Blazers, died Monday at the age of 65 due to complications from non-Hodgkins lymphoma.

He purchased the Trail Blazers in 1988 and then the Seahawks in 1996.

Athletes and other sports figures shared their prayers and condolences on social media upon hearing of Allen’s passing.

So sad to hear about the passing of @Seahawks owner Paul Allen. In my 4 years in Sea he treated me, my teammates & the coaches w/great honor & respect. The Hawks treat their players as well or better than any organization because of him. My prayers go out to his family.

— Trent Dilfer (@DilfersDimes) October 15, 2018

Rest In Peace Paul Allen. Thank you for everything! You will be missed. My prayers go to the entire Allen family.

— Tyler Lockett (@TDLockett12) October 15, 2018

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I’m saddened by the sudden news of Paul Allen’s passing. Like many, I have so many incredible memories in Seattle that would’ve not been possible without Paul’s vision, generosity, and action. One of my all-time favorite memories is seeing Paul raise the 12 Flag before the 2005 NFC Championship game vs Carolina. The crowd erupted like never before in large part because we all knew that Paul Allen had previously saved our Seahawks from leaving Seattle, making that incredible moment possible. You have done many important things, but you have left quite a legacy in football as well. From the bottom of our hearts, thank you. #ThanksPaul

A post shared by Matt Hasselbeck (@hasselbeck) on Oct 16, 2018 at 10:39am PDT

Deeply saddened by the passing of @PaulGAllen. I’ll miss him greatly. His gracious leadership and tremendous inspiration will never be forgotten.

The world is a better place because of Paul’s passion, commitment, and selflessness. His legacy will live on forever.

— Pete Carroll (@PeteCarroll) October 15, 2018

Big dog rest easy as you go home @PaulGAllen prayers for your family🙏🏾

— Shawn Lynch (@MoneyLynch) October 15, 2018

My prayers and thoughts are with the family of Mr. Allen @PaulGAllen

— Cliff Avril (@cliffavril) October 15, 2018

RIP to the man in charge of it all, Mr. Paul Allen. I hope we sent you out with high praises with our victory yesterday in London. You with the most high now, no more pain required.

— Frank Clark (@TheRealFrankC_) October 15, 2018

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Rest In Peace to this Beautiful mind. You’ll be forever remembered and missed. God bless you, Paul.

A post shared by evan turner (@evanturner) on Oct 15, 2018 at 3:39pm PDT

Paul Allen will never be forgotten. He was a great owner, an amazing leader and a truly wonderful person. I'm forever grateful that we got to share so many great moments together. His passion and dedication will be deeply missed. My heart goes out to his family and friends.

— LaMarcus Aldridge (@aldridge_12) October 15, 2018