Baseball- There was a story about a man named Abner Doubleday who invented baseball in 1839. However this is no evidence supporting this claim. Some others say that baseball was invented in 1792 in England... played with wood for bats and cans for balls.
Football- NFL football is a descendant of Rugby football which was imported to the United States from Canada in 1874. After a few transformations it became what it is today. Professional football in the US dates back to at least 1892.
Based on loose information, I'm going to guess that baseball came first, then football.
The Alabama Crimson Tide's first football game was in 1892. The Atlanta Braves first baseball game was in 1966. So Alabama's football team came first.(i.e. ATLANTA STOLE THEIR "A")
Football came first as rugby came from a cheater who played football in a pe lesson and picked up the ball, in a English town called rugby.
Probably Hockey. NHL came to be in 1917. ~Mccayde Densley it's deffinally football