BROOKINGS, S.D. (Interstat) — Chase Mason passed for 251 yards and two touchdowns as South Dakota State remained undefeated with a 31-3 win over Northern Iowa on Saturday at Dana J. Dykhouse Stadium. The Jackrabbits improved to 5-0, scoring in every quarter while their defense forced four interceptions. Greyton Gannon and Andrew Gustad each caught a touchdown pass. The Panthers managed only a second-quarter field goal and fell to 2-3.