Oklahoma State mega-booster T. Boone Pickens and coach Mike Gundy have had a frosty relationship over the years. But Pickens tweeted out a letter of support Monday that he sent to Gundy in the wake of the Cowboys' 62-52 loss to rival Oklahoma over the weekend.

The two most important figures in the ascent of the Oklahoma State football program, Pickens and Gundy have feuded publicly in the past.

Just last year on a podcast with the Austin American-Statesman, Pickens said Gundy "doesn't handle people relationships very well, and he gets mad about things. I've heard he's written some notes about me that weren't very complimentary."

That weekend, after the Cowboys defeated Texas, Gundy responded, "I hate that he feels the way he does," in an interview with KRXO-FM The Franchise.