I was trying to avoid as many OTL mainstream team names as possible, hence no Steelers (it doesn't help I'm pretty much an anti-Steeler when it comes to teams
), and "Ironmen" was the team name of the Pittsburgh BAA basketball team from 1946-1947. Still, I can see your point about catchiness.
Also, nice list MacGregor. Sorry for missing Santa Monica in my list before (although I'm sad to see the San Francisco Locos gone, I put a lot of thought into that one
), and I'm glad you took my suggestions for the Sentinels and Buccaneers
EDIT: For Milwaukee, would "Hogs" do the trick? It's a meta-reference to Harley-Davidson, and you never said Milwaukee couldn't also be known for motorcycles as OTL; if that doesn't work, maybe "Milwaukee Bavarians"?. For Baltimore, "Mariners" I think could work since it IS a major port. Cleveland could always use the "Groovers" (reference to OTL Cleveland's role in rock'n'roll history), and I honestly don't have any idea what else to call St. Louis' team (although, honestly, I'd like to think they'd be more of a football town, which would also echo from OTL since it's one of America's most pro-soccer cities).