Agreed. Think about how this game could be affected if Marble picks up two quick ones to start the game or gets his 3rd and 4th early in the second half. What other defender on Iowa's roster can legitimately keep up with Kane?
Marble was nonexistent against ISU last year on the offensive end. 2-10, 0-4 from three in 37 mins. He is a solid defensive player and if he were to get in foul trouble would be missed. They've won games without him in the past though.
Iowa will play quite a bit of zone I think.