with football shaped decals on their helmets in 1969, but, as always, there’s controversy.
Historians maintain that the famous Rutgers - Princeton game in 1869 was actually soccer, not football. The first football game was between Harvard and McGill from Montreal and was played in 1874, using rules more like rugby than soccer....the “Boston game.”
https://en.wikipedia.org/wiki/1874_Harvard_vs._McGill_football_game?wprov=sfti1