Holmes keyed a 20-4 run in the first half that opened up a 13-point lead, and the Barons never looked back.
Guard Joey Baker added 21 points for St. Petersburg, and played a big role in the win.
"In certain games, it's a good matchup for Joey," SPC coach Mike Moran told C.J. Rijak of the St. Petersburg Times. "They're always going to be doubling (Holmes), but when Joey can play on the perimeter he's effective."
The Barons advanced to the State semifinals of the Class AAA playoffs where they will face Melbourne (Fla.) Florida Air Wednesday, March 9th at 2:30. The game will be held at the Lakeland Center in Lakeland, Florida.