I don't think the length of the baseball season holds it back at all. And people who don't think baseball is exciting and think it is slow don't fully get the strategy of it. I do think MLB is killing itself though. Steroids makes the last era either literally or theoretically have an asterisk beside it, the best hitter and the best pitcher I've ever seen were both cheating. How often do you turn on the TV and see baseball talk when steroids aren't mentioned? The lack of a salary cap means that the Yankees can go out and spend more money this off season than the entire NL, while small market teams like my reds bring up great talent only to see them go make their millions somewhere else.

The NFL just plain dominates. The games are played when most people aren't working, the season is nice, short and easy to follow. Every team has a chance to be shitty one year then go to the Superbowl the next or make the playoffs(Dolphins, Falcons, Cards). Even their freakin draft is a bigger event than alot of other sports playoff games. Fantasy football(more popular than baseball IMO) also helps the NFL tremendously. People tune into awful teams like the Lions because Calvin Johnson is on their team. Betting is also really popular in the NFL. Jersey sells are greater than any other sport. I could go on and on and on...but like I said, the NFL just dominates.