Warriors coach Steve Smith inserted Lawson into the game with about three minutes left in the first quarter and the game tied at 11.
"We were up 65-35 at the half," Smith said. "That tells you how well he played."
"We're a different team without him," added Smith. "We're more of a halfcourt team."
Lawson was 7-of-12 from the floor, 2-of-5 from long distance and 8-of-9 from the free throw line. Reynolds, who was guarded by Nolan Smith for much of the game, finished with 27 points.
Oak Hill improved to 16-0 with the win.