Yurtseven put in a short left-handed hook to get the Hoyas within a point with 50 seconds left before the Red Storm’s Rasheem Dunn failed to hit the rim on a drive and tip, resulting in a shot-clock violation. After a timeout, Jagan Mosely got the ball inside to Yurtseven for the layup.
Dunn took the inbounds and raced down the side but lost control of the ball and the Hoyas ran out the clock.
Javon Blair made five 3-pointers and led Georgetown (13-9, 3-6 Big East) with a career-high 23 points. Mosely added 16 and Yurtseven had 13 points with 15 rebounds.
Dunn and Mustapha Heron scored 16 each for the Red Storm (13-10, 2-8). Julian Champagnie added 14 points and 10 rebounds.
St. John’s led by 17 with 16 minutes left before the Hoyas tied it briefly on a Yurt-seven dunk with 6½ minutes left.
McClung, the star sophomore guard, didn’t play because of a foot injury.
Hoyas coach Patrick Ewing said the Gate City native will undergo an MRI on Monday to determine the extent of injury, adding that doctors and trainers will then determine how long McClung may be out.
“He’s an integral part of our team, but what I told the guys before the game is that we still have enough to be successful,” Ewing said during the postgame news conference.
The Hoyas host No. 10 Seton Hall (16-5, 8-1) on Wednesday.