15 months ago, Ryan Day added some fire to the rivalry.
During a Big Ten coaches conference call in August of last year, Michigan coach Jim Harbaugh reportedly interrupted Ryan Day and accused the Buckeyes of breaking rules with impermissible on-field instruction, according to a report from Bucknuts.
Day promptly dismissed Harbaugh and his allegations, reportedly saying "how about I worry about my team and you worry about yours?"
Then came Day's legendary quote.
In a team meeting later that afternoon, ESPN confirms Day told his team that Michigan better hope for a mercy rule because the Buckeyes were "going to hang 100 on them.