Records from 2001 to present. The total is affected by OSU's "vacated wins" -- if you count those games OSU's % would be even higher
Ohio State: 184-38 (.829)
Wisconsin: 168-69 (.709)
Penn State: 148-78 (.655)
Michigan: 148-79 (.652)
Iowa: 147-82 (.642)
Nebraska: 144-89 (.618 )
Michigan State: 140-89 (.611)
Northwestern: 121-103 (.540)
Maryland: 113-111 (.504)
Minnesota: 110-115 (.489)
Rutgers: 103-120 (.462)
Purdue: 98-125 (.439)
Illinois: 80-138 (.367)
Indiana: 77-139 (.356)
Ohio State: 184-38 (.829)
Wisconsin: 168-69 (.709)
Penn State: 148-78 (.655)
Michigan: 148-79 (.652)
Iowa: 147-82 (.642)
Nebraska: 144-89 (.618 )
Michigan State: 140-89 (.611)
Northwestern: 121-103 (.540)
Maryland: 113-111 (.504)
Minnesota: 110-115 (.489)
Rutgers: 103-120 (.462)
Purdue: 98-125 (.439)
Illinois: 80-138 (.367)
Indiana: 77-139 (.356)
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