This has been a trying year for Colorado's Askia Booker.

His shots haven't been falling on game days like they have in practice. Fans have been calling for him to be benched.

CU head coach Tad Boyle believes in Booker, though, and on Saturday afternoon Booker proved why.

The junior guard drained a running 3-pointer at the buzzer to lift the Buffaloes to a stunning 75-72 win over No. 6 Kansas at Coors Events Center.

"You can see the reason I have him on the floor at times," Boyle said. "I see him in practice every day. There's some frustration on everybody's part -- coaches, teammates, Ski -- that he hasn't shot the ball as well as he's capable of. The capability is there.

"It was really good for us and for our program to have him make the shot."

With the game tied at 72-72, the Buffs inbounded the ball with 2.9 seconds to play. Xavier Johnson passed it to Booker, who dribbled two times and made a move to shake KU defender Frank Mason. He then launched his 30-footer over the outstretched arms of Jayhawks' star Andrew Wiggins.

Booker's shot sent the sell-out crowd of 11,113 fans into a frenzy as they rushed the court.

"I'm not sure if I ever thought that would happen, realistically," Booker said of hitting a game-winner of that magnitude. "At the same time, it's a testament to coach, going through our late clock plays at the end of practice every day. The reason why he does it is for nights like this and thank God I came out and hit a shot."

The junior, who came into the game hitting just 23.8 percent of his 3s, finished with 15 points. He was 3-for-6 from 3-point range as CU (9-1) snapped a 19-game losing streak against the Jayhawks (6-2). KU had been 46-1 against CU since 1991.

KU is the highest-ranked team CU has defeated since a 91-89 win over No. 5 Texas on Feb. 26, 2011.

"It's huge," senior center Ben Mills said. "I'm glad I was a part of it and it was just a lot of fun."

The Buffs won despite being outshot by the Jayhawks, 52.9 percent to 41.1, and despite missing 15 of their 37 free throw attempts.

Spencer Dinwiddie also had 15 points for CU, while Johnson and Josh Scott each had 14. Wiggins had a game-high 22 points for Kansas, 17 of those in the second half.

"I look at the stat sheet and I wonder how we won," Boyle said. "Our guys' resiliency and guts really won out. I'm just glad we had the ball at the end, because they were scoring pretty quick and pretty easy down the stretch."

KU's roster features four players who are projected as first-round picks in the 2014 NBA Draft -- Wiggins, Perry Ellis, Joel Embiid and Wayne Selden Jr. -- and at times the Jayhawks played like it.

During the middle portion of the game, however, CU outscored KU 41-23.

Freshman Tre'Shaun Fletcher had a steal and coast-to-coast dunk, while drawing a foul on Wiggins, with 11:31 to play. Fletcher missed the free throw, but CU had its biggest lead of the game, 53-44.

"I knew he was going to throw the pass, so right as I saw him throw it, I just took off and I looked back and saw (Wiggins) was coming," Fletcher said. "I just tried to go up and jump as high as I can."

That play got the crowd rockin' but CU couldn't capitalize on the energy. In fact, Kansas responded with a 9-0 run to tie the game.

Kansas never could get the lead back, though, as CU weathered that surge and made enough plays down the stretch.

"If we don't keep our poise, we don't win this game," Booker said.

The Buffs needed their poise, because Kansas matched nearly every big play the Buffs made. Perry Ellis hit a layup with four seconds left to tie the game at 72-72.

The Buffs called a timeout and had three seconds to execute the last play.

"I thought Xavier Johnson made an unbelievable pass to get to the ball to Ski," Boyle said. "As soon as (Booker) let it go, I knew it was in. It was money."

Booker also hit a buzzer-beater to end the first half, and another 3 with 3:36 to play that gave the Buffs a 63-57 lead.

"I'm still in the gym as often as I was, but it's frustrating when you work as hard as I do and the ball doesn't go in," Booker said of his season-long struggles. "At the end of the day, it's not always about the ball going in; it's about the guys to the left and the right of me. Those are the guys that matter most. If I can bring my energy every game and compete as hard as I can, I think the team will be fine.

"If I don't hit my shots, I feel like I'm hurting the team."

Saturday afternoon, he was hurting for a different reason. He had a sore left shoulder after getting caught up in the wave of fans that rushed the court.

"It hurts pretty bad right now, but don't worry about it," he said. "It's nothing too serious. It should be fine tomorrow."

After the biggest shot of his career, Booker ought to be feeling good.

Contact staff writer Brian Howell at howellb@dailycamera.com or twitter.com/BrianHowell33.

Fast break

What went right

Colorado was aggressive throughout the day and poised down the stretch in knocking off the No. 6 Kansas Jayhawks.

What went wrong

The Buffs gave up points in a hurry at times. KU started the game on a quick 7-0 run and then had a 9-0 spurt that tied the game in the second half.

Star of the game

Askia Booker. The junior guard hit three monster 3-pointers, including the game-winner at the buzzer. He finished with 15 points, three rebounds and a steal.

What's next?

The Buffs will host Elon on Friday at 6:30 p.m.

Colorado 75, No. 6 Kansas 72

KANSAS

FG FT Reb

Min M-A M-A O-T A PF PTS

Black 3 0-0 0-0 0-0 0 3 0

Ellis 31 5-6 0-0 3-8 3 3 10

Mason 34 3-9 4-7 0-3 4 2 11

Selden, Jr 20 3-6 0-1 1-4 0 3 7

Wiggins 28 7-11 7-9 1-5 0 4 22

White III 4 0-1 0-0 0-0 0 1 0

Tharpe 28 3-5 0-0 0-1 2 2 8

Greene 4 0-1 0-0 0-0 0 0 0

Embiid 28 4-7 2-3 1-4 2 5 10

Frankamp 4 0-3 0-0 0-0 0 1 0

Traylor 13 1-1 0-0 1-6 0 2 2

Lucas 3 1-1 0-0 0-1 0 0 2

Totals 200 27-51 13-20 8-33 11 26 72

Percentages: FG .529, FT .650.

3-Point Goals: 5-20, .250 (Tharpe 2-4, Selden, Jr. 1-3, Wiggins 1-3, Mason 1-5, White III 0-1, Greene 0-1, Frankamp 0-3).

Team Rebounds: 1.

Blocked Shots: 5 (Traylor 3, Embiid, Wiggins).

Turnovers: 14 (Embiid 4, Mason 2, Wiggins 2, Frankamp, Selden, Jr., Traylor, Ellis).

Steals: 3 (Embiid 3).

Technical Fouls: None.

COLORADO

FG FT Reb

Min M-A M-A O-T A PF PTS

Johnson 33 4-9 5-8 2-6 0 0 14

Scott 28 6-9 2-2 2-4 2 2 14

Booker 33 5-12 2-6 1-3 0 3 15

Hopkins 27 1-4 0-0 0-4 3 4 3

Dinwiddie 31 3-8 8-10 0-1 7 4 15

Talton 9 0-3 0-0 0-1 0 0 0

Fletcher 11 2-3 2-5 2-2 0 0 7

Thomas 16 0-3 3-6 3-4 1 1 3

King 2 0-2 0-0 1-2 0 1 0

Mills 10 2-3 0-0 2-3 0 1 4

Totals 200 23-56 22-37 15-32 13 16 75

Percentages: FG .411, FT .595.

3-Point Goals: 7-22, .318 (Booker 3-6, Johnson 1-2, Fletcher 1-2, Hopkins 1-3, Dinwiddie 1-5, Thomas 0-2, Talton 0-2).

Team Rebounds: 2.

Blocked Shots: 1 (Dinwiddie).

Turnovers: 8 (Hopkins 2, Dinwiddie, Thomas, Booker, Johnson).

Steals: 7 (Johnson 3, King, Hopkins, Booker, Fletcher).

Technical Fouls: None.

Kansas 30 42--72

Colorado 33 42--75

A -- 11,113.

Officials -- Mark Whitehead, Larry Spaulding, Darron George.