The coaching additions have helped the players improve throughout the summer, Marley said.
"It shows the kids that the school is placing an importance on this program and seeing us do well," he said. "It also helps that the players try to impress the new coaches, so they're working really hard."
Okmulgee coach has big expectations for first year
John Horner is entering into his first season with Okmulgee, which finished 6-5 last season. His first challenge has been teaching his players a new system.
"It's a slow process in the first year, but they've caught on pretty good," he said. "I stress that the big thing is fundamentals and work habits."
One of Horner's first changes was to speed up the tempo of the team's practices.
"The tempo you have in practice sets the tempo you're going to have in a game," he said.
Horner believes his team can compete with anyone, even as they learn a new offense and defense.
"We expect to win every game we line up in," he said.