Grimsby Town beat League One Doncaster Rovers in their first home pre-season friendly of the summer.
In a physical encounter, a single goal scored by Jake Hessenthaler with seven minutes to go proved enough to separate the sides.
Mariners XI: McKeown, Gibson, Öhman, Pollock, Hendrie, Clifton, Hessenthaler, Whitehouse, Ogbu, Hanson, Green.
Subs: Battersby, Cook, Curran, Buckley, Ring, Starbuck, Rose, Wright.