Jacob UnruhMcGuinness’ quarterback battle twisted last week when senior Jennings Jarman suffered an ankle injury early in the Irish’s scrimmage at Lawton MacArthur. Jarman was held out of the rest of the scrimmage for precautionary reasons and may not play in Thursday’s scrimmage at the Mustang Preview. That would leave junior Jacob Mullins to receive the bulk of the plays. “They both know how to operate our system, which is what we like,” McGuinness coach Justin Jones said.Read more on NewsOK.com