[jeffalbertson]

the XFL missed an opportunity to focus on baseball instead. NFL is too strong on the marketing front and dynamically changes their rules to meet new needs.

Baseball is poorly marketed and is extremely slow to change (not always a bad thing). But an XBL, or something like it, would have been a stronger challenger to the MLB than the XFL was to the NFL.

[Spooky23]

The difference is that colleges and high schools are the farm leagues for football and basketball.

Baseball is vertically integrated, and the talent is mostly controlled immediately.

[moate]

MLB also have a literal monopoly in place and endorsed by law. So, there's also that.