Oh yes - every baseball fan should recognize the St. Louis Wolves, too.
Robot Arm and astorian get a point for the London Silly Nannies. 
Wash gets another for the Renford Rejects.
Elendil’s Heir gets a point for the London Kings (Deep Space 9).
And Sr Siete finally gets the sport for the Bay City Blues.
Here’s the rest:
Brentwich United — United! (football)
Brooklyn Bimbos — Pride of the Bimbos (baseball)
Charlotte Banshees — Juwanna Mann (basketball)
Gotham Goliaths — DC Comics (baseball)
Moose Knucklers — Dodgeball (dodgeball)
Pittsburgh Ironmen — Queer As Folk (American football)
San Francisco Saints — Monk (baseball)
Swindon Mallets — Thursday Next (croquet)
You might also take a peek at Name That Company!
No love for the Pittsburgh Pisces?
Well, don’t mind if I do.
West Canaan Coyotes
Beacon Town Beavers
Hamilton Mustangs
Rancho Carne Toros
Big Lake Owls
Houston Toros
Team Iceland National Junior Team
Flint Tropics
(I wanted to do ten- but in double checking came up with two that were on the list already 
)
Milwaukee Beers
Monroeville Zombies
Hamilton Mustangs: Youngblood-ice hockey
Team Iceland National Junior Team: Mighty Ducks 2-ice hockey
Houston Toros: Bad New Bears in Breaking Training-baseball
The Beers are from BASEketball, obviously.
Pittsburgh Pisces
Zhambel Horsemen
Syyracuse Bulldogs
Keystone City Combines
Milford Mudlarks
Westview Scapegoats
Westview Scapegoats: Funky Winkerbean. Mainly football, I think, although I suppose they play other sports too.
Correct correct and correct.
So, for my part that leaves:
West Canaan Coyotes
Beacon Town Beavers
Rancho Carne Toros
Big Lake Owls
Flint Tropics
Hockey Zack and Miri Make a Porno
Flint Tropics - “Semi Pro”
Again correct… Which leaves
West Canaan Coyotes
Beacon Town Beavers
Rancho Carne Toros
Big Lake Owls
All High School teams, by the way-- just, a hint.
West Canaan Coyotes
Beacon Town Beavers
Rancho Carne Toros
Big Lake Owls
Well… since the thread seems to have died: I’ll put in some spoilered answers in case anybody was wondering.
West Canaan Coyotes: Varsity Blues Football
Beacon Town Beavers: Teen Wolf Basketball
Rancho Carne Toros: Bring it On Cheerleading (Kind of cheating I suppose… but I consider the competetive cheerleading a sport)
Big Lake Owls: The Rookie Baseball (In Real Life they were Reagan High School… but for the movie they were Big Lake HS)
London Kings-Baseball Deep Space Nine
Captain Sisko had a holodeck recording of the last World Series played, and the Kings were one of the teams to play.
I don’t know why this bit of trivia has stuck in my head. It’s been YEARS since I saw that show!
On review I see I was way too late, overlooking Elendil’s Heir
I’m pretty sure the New York Knights are in the Five Yard Fuller books, too. Man, I haven’t thought of those books in years. Good to know the brain still works.
Rancho Carne Toros - “Cheerleading, Bring It”
Er…“Bring It On” rather.
Anyone recognize the New York Mammoths?
Henry Wiggen’s team in “Bang the Drum Slowly”.