Head coach Jim Morrell says he discovered Tuesday the Hornets had played an ineligible player and promptly notified the Georgia High School Association.
Pelham High will forfeit wins against Baconton Charter and Stewart County.
That means Baconton Charter has their first ever varsity win.
The Stewart County game is a region loss for Pelham.
The Hornets will host Randolph-Clay in a key 1-A game on Friday.