Tim Duncan, one of greatest players in the history of pro basketball, announced his retirement on Monday, confirming the NBA would no longer have one of its All-Star Bears fans roaming the court.

Duncan is a quiet and humble person, but there’s no doubt where his heart lies on football Sundays.

Back in 2007, the Spurs were boarding a flight from San Antonio to Chicago to play the Bulls on the same night the Bears were in a divisional playoff game against the Seattle Seahawks.

The Bears fell behind in the third quarter after taking an early lead, but Rex Grossman and Cedric Benson drove the team into field-goal range for Robbie Gould to tie the score with just over four minutes to go. The defense held strong and forced overtime.

The Spurs’ flight was set to take off as the Bears game neared the end of regulation, but Duncan refused to miss the end of his favorite football team’s playoff game. He delayed his team’s flight so he could watch overtime, according to Bears sideline reporter Zach Zaidman.

Tim Duncan, a die-hard #Bears fan, delayed a #Spurs team flight in 2007 because the Bears/Seahawks playoff game had gone into OT. — Zach Zaidman (@ZachZaidman) July 11, 2016

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On top of that, Duncan always kept a Bears box and a mini helmet in his Spurs locker, according to ESPN’s Michael Wright. Those two pieces signaled to everyone his allegiance in the NFL.

We weren't allowed to take pics in the locker room. But Tim Duncan always kept a Bears mini helmet and a Bears box in his locker. — Michael C. Wright (@mikecwright) July 11, 2016

He’s such a big Bears fan that he referred to the team as “we” when he was asked about the team’s hiring of John Fox a year ago.

We will miss Duncan’s presence in the NBA, but maybe now he’ll have some free time to catch all of Chicago’s games this fall.