1997 Iowa 1997 Iowa 1997 Iowa 1992 Iowa 1992 Iowa 30-15 2003 Oklahoma State 1 33-7 9 2020 Iowa 2012 Penn State 20-18 2012 Penn State 2 24-19 13 2018 Penn State 1992 Iowa 26-18 1992 Iowa 3 22-20 10 1992 Iowa 1995 Iowa 1995 Iowa 24-17 15 2005 Oklahoma State 4 22-20 2017 Penn State 2017 Penn State 1983 Iowa 1ST 1987 Iowa State 5 35-8 11 2001 Minnesota 1983 Iowa 21-18 1991 Iowa 1983 Iowa 6 33-6 14 2010 Iowa 1991 Iowa 23-21 1991 Iowa 7 28-17 12 1991 Iowa 2019 Penn State 2019 Penn State 21-18 1986 Iowa 8 24-15