A driving shot by the Blue Devils’ Sarah Thompson with five seconds left in regulation put Gate City out in front 48-47.
Grubb was fouled as time expired and made one free throw to send the game into overtime.
Thompson delivered a shot with under a minute to play to give Gate City the lead at 53-52, but Kayla Honaker hit a 3-pointer to put East back in the lead.
Thompson went coast to coast on the inbounds pass and tied it at 55.
Mattie Gouge hit a 3-pointer with 10 seconds remaining to win the game.
Rye Cove 51, Lee 48
BEN HUR — Kaleigh Sloan scored 18 points for the Eagles in a close win over the Generals.
Katy Roller had one 3-pointer and 12 points.
Baylee Cox led the Generals in scoring with 14 points.
Wise Central 72, Letcher Co. Central (Ky.) 40
WISE — Dee Cvetnich scored 18 points for the Warriors in a dominating win over the Cougars.
The Warriors racked up seven 3-pointers, with Hannah McAmis and Hannah Carter each knocking down two.
Emma Maggard led the Cougars with 14 points.