The 2014-2015 national championship run has been the highlight of my Buckeye fandom. 59-0, beating Bama and then dominating Oregon still gives me chills. Also beating the top 3 heisman vote getters in a row.
The Cavs were the first team in NBA finals history to come back from 3-1. Having to win 2 games on the road vs the best regular season team of all time was impressive. I wasn't rooting for the Cavs but I was happy when the buzzer sounded.
I have to go with the national championship run for the Buckeyes. I love Ohio State and those 3 games solidified them as a top 2 program in the country. If people thought the Buckeyes left, it made everyone say they're back.