TR is very important to the survival of college football at the turn of the century. He essentially convinced Ivy League school presidents to adapt rules instead of abolishing the sport which would have been detrimental to the sport at the time. He is also influential is helping create the NCAA, which obviously had a great influence on the sustainability of not just football, but college sport in general.
TR was shot during an attempted assassination while running for Pres in 1912. This came right before giving a campaign speech. He went on to give the speech, then sought medical attention.
At the outbreak of WWI, Roosevelt wanted to create a voluntary infantry group and go take on the Germans (basically regroup his Rough Riders from 1898). This one is always funny to me because I always picture these guys:
taking on this:
BUT being about twenty years older.
Luckily, Woodrow Wilson denied this request.
Basically TR is the man.