Sports is the original, and best, reality TV. It's better to watch in person but HDTV is the next best thing.
General Sports Links
Chris Creamer's Logos Page: A very comprehensive website.
Field of Schemes: I love sports, but don't believe the public should subsidize for-profit operations. If a franchise wants a new stadium they should pay for it themselves.
Stadium Journey: Stadium reviews, all sports.
Baseball is easily my favorite sport.
In the majors I root for the Cincinnati Reds. They were World Champions in 1990, which may seem like a long time ago, but compared to the hell endured by Cubs fans, it's yesterday.
While I disagree with many of the things Major League Baseball has done in the last few decades (inter-league play, wildcards) they do have an excellent web presence.
Pictures and reviews of ballparks from around the continent at Ballpark Reviews.
The Brooklyn Cyclones, baseball in Brooklyn.
If into stats or history, check out the Society for American Baseball Research.
Football is probably my second-favorite sport. The media saturation of the National Football League is impressive but also, in my opinion, somewhat overblown. The ramp-up to the NFL draft is truly bizarre if one thinks about it.
The New York Jets, who always seem to have a story that is NOT winning a Super Bowl. I love this team but it is a tough love.
Anyone who's a fan of small college football might want to stop by D3football.com.
The 1995, 2000 & 2003 Stanley Cup Champion New Jersey Devils!!! They are rarely a pretty team to watch and generally play a blue-collar style game.
The 1954 & 1985 NCAA Division 1 Champions RPI Engineers.
Without the internet, I doubt the increased interest in world soccer would have happened in the United States. In the 1990's no one ever asked me if I followed the EPL. Now everyone I meet does. But I still don't.
The New York Cosmos were the team I followed as a kid. Now they are back, kind of? I don't really know. I have not gotten into Major League Soccer because the New York (or New Jersey, as it is) team never appealed to me.