Ponca City’s Sullins Stadium will be the site of a Oklahoma Secondary School Activities Association football playoff game Friday night. The game will be a Class 6AII semifinal round contest between Muskogee and Deer Creek of Edmond. Both teams were opponents of the Wildcats earlier in the season. In Game Four for Ponca City, Deer Creek won 65-26. Last week, Muskogee defeated the Wildcats 34-10…