LAWRENCE, Kansas (Ticker) -- After Tony Dobbins made the game's biggest defensive play, he added the biggest shot.
Dobbins nailed the game-winning jumper with one second lift to give Richmond a 69-68 upset that snapped the 12-game home winning streak of 10th-ranked Kansas.
Kansas (11-3) had a 68-64 lead, but Aaron Miles failed to add to it when he missed a 1-and-1 opportunity with just under a minute left. Patrick O'Malley's 3-pointer cut the Spiders' deficit to one point with 47 seconds to go.
The Jayhawks looked confused on their next possession, forcing coach Bill Self to call a timeout. They looked even worse after the stoppage and Miles' rushed 3-pointer was blocked by Dobbins, the reigning Atlantic 10 Conference Defensive Player of the Year, for a shot clock violation.
Dobbins took the ensuing inbounds pass, dribbled off some clock and pulled up for a 14-foot jumper that swished through for just his second basket of the game.
"We came down and ran a play to (Mike) Skrocki coming off a double screen," Dobbins said. "I saw it was tough to get him the ball and I knew I had a smaller defender on me, so I shot it and I am glad it went in."
Kansas had one last chance, but Wayne Simien was whistled for an offensive foul and Richmond (10-8) ran out the clock before celebrating in a stunned Allen Fieldhouse.
"One of the things we tried to do was test ourselves this year," Richmond coach Jerry Wainwright said. "We have played in some really tough venues and our league is very tough. There is great excitement when you beat a national program."
Skrocki scored 16 of his 23 points after halftime to keep Richmond afloat. Still, Kansas appeared to have the game in hand when Miles' three-point play made it 63-54 with 6:21 left.
But that was one of only three baskets - all by Miles - for Kansas in the final eight minutes as it was stifled by Richmond's 1-3-1 zone. The Jayhawks were 2-of-11 from the arc and committed 18 turnovers.
"We're up nine with the ball and we were going too fast and our mistakes led to them getting back into the game," said Self, who was whistled for his first technical of the season in the second half. "We didn't attack the zone in the last 10 minutes and then when we did, we didn't make our free throws."
Keith Langford led Kansas with 18 points and Simien added 14 and 14 rebounds, but the frontcourt duo was invisible down the stretch. The Jayhawks were 10-of-17 from the line in the second half.
"We knew their inside guys were a big force, we tried to isolate them, but they still killed us," Dobbins said. "Then we started packing it into the zone, they weren't really shooting threes very much."
Kansas fell to 0-3 when being held under 70 points.