Central Michigan‘s quarterbacks coach Jake Kostner has resigned from his post, according to a report from The Athletic. The publication notes Kostner provided his resignation letter to Central Michigan on Aug. 31, stating he will “pursue other opportunities.” It’s unclear whether Kostner’s resignation is related to an ongoing investigation into how former Michigan staffer Connor Stalions came to be on the Central Michigan sideline for a game last fall. But the news surfaced just before the 2024 season began. FootballScoop.com reported at the end of July that coach Jim McElwain had made a numbe…