Safety wasn't the number one priority in 1905 college football, and it hadn't improved much by 1923.
"In 1923 at Iowa State, Jack Trice, their first black football player wrote, 'My thoughts just before the first real college game of my life: The honor of my race, family & self is at stake. Everyone is expecting me to do big things. I will. My whole body and soul are to be thrown recklessly about the field tomorrow. Every time the ball is snapped, I will be trying to do more than my part. On all defensive plays I must break through the opponents' line and stop the play in their territory. Beware of mass interference. Fight low, with your eyes open and toward the play. Watch out for crossbacks and reverse end runs. Be on your toes every minute if you expect to make good. Jack.' He died from injuries suffered in the game."