Presbyterian's Armel TeTe made a layup to open the scoring in overtime but the Blue Hose (11-18, 4-12) went 0 for 6 from the field, missed their only free-throw attempt from there and Radford closed on an 8-0 run.
Davon Bell hit a 3-pointer to give Presbyterian a 66-65 lead with 13 seconds left in regulation but Phillips hit 1-of-2 free throws with a second left to force overtime.
Senior Ruben Arroyo, who came in averaging 3.4 points per game, hit five 3-pointers and finished with 17 points -- both career highs -- for the Blue Hose. Bell added 16 points and six assists.
Rose not worried about Duke after Tre Jones injury
Jalen Rose notes Dukes' "team of All-Americans' as a reason to not worry about the Blue Devils after Tre Jones goes down with a shoulder injury.
Behind the bracket: Which teams are best positioned for No. 1 seeds?
We're a long way from March, but Joe Lunardi already knows the best candidates to be on the tournament's top line.
Self shows off his rings
Kansas Jayhawks coach Bill Self shows off his championship ring collection to Holly Rowe, a collection that stays in his office.