Baseball
BoomBats, Inc., Collecting Baseball Memorabilia, Eagle Sports Autographs & Memorabilia, Sports Card Depot, T206 Museum, The Baseball Museum Collection, Vintage Rare Backs
Cards
Auto Racing, Baseball, Basketball, Football, Hockey, APBA Games, Autopatchcards.com, Best of Both Worlds, Card Jungle, Cardbuzz.net, CardLinks, CardTarget.com, Cas's Sportscards, Checklist Central, Chitownjak's Card Page
Fishing
Antique Fishing Lures, Antique Fishing Lures and Boxes, Antique Fishing Lures, Reels & Tackle Informat, Antique Lure Collectibles, Charley's Baits, Drexel Grapevine Antiques, Fishing Decoys, Florida Antique Tackle Collectors, Inc., Glass Fishing Floats, Granville Island Sports Fishing Museum
Hockey
AN Sports Collectibles, Beantown Memorabilia, David's BeeHive Hockey Photos, Fred's Puck Collection, GameWorn.net, Hockey Pin World, Hockeyology Cards, JWOguy13's Headliners Page, Mark's Hockey Autograph Page, Pocket Dennis - Food Issues Specialist,
Canadian Sports Collector
Magazine about collecting Canadian team and player related items.
TennisCans.com
Vintage tennis ball can and container database. Includes message board, photos, manufacturers, guide to cleaning cans, age, history, and type.
The Olympic Collectors Commission
Features stamps, coins and memorabilia items in a virtual gallery, including items from 1896 Athens and forward to Sydney 2000. Also offers event list and related links.
Washington State Sports Collectors Association
Sponsors an annual show in Seattle. Includes club meeting times, show information and dates, dealer profiles, and membership information.