North Carolina Tar Heels head coach Roy Williams announced his retirement on Thursday as he concluded an illustrious coaching career in the collegiate ranks. Amid the recruitment wars over the past decades, the tenured mentor pitched his services to a ton of great talents including Jason Kidd who went on to have a Hall of Fame career in the big leagues.

A handwritten letter from Williams was recently discovered in an abandoned storage locker, per TMZ Sports. Serving as the head coach of the Kansas Jayhawks back in 1990, Williams penned a letter on a “Memories of Hawaii” postcard as his team flew back to Los Angeles after playing a game in Honolulu, Hawaii.

The letter was dated January 2, 1990, and was sent out to reach Kidd's house located in Oakland.

“Jason, We're on the plane from Honolulu to Los Angeles & we had a great trip to Hawaii. Our players really enjoyed it & worked hard while we were there also. We're going again in two years & I hope you're with us.”

“Jason — I hope Kansas will be an option for you. I know I would love to be your coach.”

A handful of other elite basketball programs also went after Kidd including UNLV head coach Jerry Tarkanian, Kentucky head coach Rick Pitino, and UCLA head coach Jim Harrick, among others. Despite Roy Williams' efforts, the highly-touted prospect ultimately chose to play for Lou Campanelli and the University of California where he would round out two years of playing in the collegiate ranks.

Kidd eventually took his talents to the association where he was selected as the second overall pick in the 1994 NBA Draft en route to a legendary professional career.

All of the postcards were discovered in an abandoned storage locker which was found in Calabasas, California. It was already purchased by a collector who is now listing the memorabilia for sale on eBay. Considering how Jason Kidd's career transpired over the years, it wouldn't be a surprise if the postcards would hold immense value and fetch a ton of money today.

As for Roy Williams, he's wrapped up a tremendous coaching career where he spent the bulk of it with North Carolina and Kansas.