This is where age and a poor memory make it difficult.
In baseball, I’m pretty sure I’ve seen every AL team and at least half of the NL teams.
In football, I’ve seen (that I can recall): Bucs, Saints, Falcons, Bengals, Steelers, Redskings, Lions, Packers, Vikings, Cowboys, Dolphins, Bills, Raiders, Browns and the Miami Hurricanes.
In soccer, I saw the Rowdies, Strikers, Cosmos, Sockers, Whitecaps, Washington team (can remember their uniforms, but don’t recall the name - maybe the Diplomats) during the NASL games, and probably a few more I don’t recall. In the Bundesliga/2nd Bundesliga I’ve seen Borussia Moenchengladbach, Dortmund, 1860 Munich and SpVgg Greuther Fürth. If national team games count, then add in USA, Ecuador, Costa Rica, Cuba, Brazil, Iran, El Salvador, South Korea, Portugal, Poland, Italy, Saudi Arabia, Belgium and Nigeria. Women’s national team games have seen North Korea, USA, Sweden and Germany. May be missing a couple there.
In basketball, the Atlanta Hawks, but I don’t remember who they played. Only went once. Also saw a Globetrotters / Generals game once, but not sure that counts.
In hockey, the Atlanta Flames, the Cleveland Barons, St Louis Blues and Pittsburgh Penguins
In Lacrosse, I saw the Baltimore team play someone. That was a lot of fun, but don’t remember who they played.
