McNamara's three with 8:36 put the Orangemen up 50-43 – and Syracuse never looked back.
That wasn't the only big three the guard from Scranton, PA hit.
The Orangemen trailed early, 14-2, and found themselves behind 31-25 at halftime. But McNamara's three with 14:26 left in the second half gave Syracuse its first lead of the game, 40-39.
The Orangemen advanced to the Sweet 16 with the win and will face Auburn in Albany, N.Y.
Syracuse 68, Oklahoma State 56
Cuse Nation Top Stories
Edwards Eyeing his Official VisitsBrian Edwards has four officials set, but one remains undecided. Florida's No. 6 safety discusses his upcoming official visits and more.
Scout Football7:44 AM
Defense Dominates in SU's 76-30 win over CSUCuseNation.com recaps Wednesday's game between the Syracuse Orange and the Coppin State University Eagles.
Cuse NationYesterday at 11:20 AM
Syracuse first to offer ESL juniorsEast St. Louis (Ill.) juniors Jarell Anderson and Terrion Williams both picked up their first offers last week and both from the same school.
Scout FootballYesterday at 9:47 AM
Replacing AmbaSyracuse will have to find a replacement for All-ACC receiver Amba Etta-Tawo next season. CuseNation.com breaks down some early candidates.
Cuse NationTuesday at 8:00 PM