Even if you were correct that soccer isn't popular in the US -- and you're not -- it seems incredibly thin, logically speaking, to blame the purported unpopularity on the league/cup system employed. I did nothing of the sort. Soccer is unpopular as a spectator sport here, because Americans find it boring to watch. It's a fringe, niche sport in the U.S. Sorry if that hurts your feelings or whatever, but the numbers are what they are, and the absence of any meaningful national TV deal proves the point. So to make the argument, as others have, that Americans would embrace a multiple-champion setup in baseball because it works in soccer is inherently flawed, because soccer itself hasn't worked in America (at least not as a spectator/fan sport). Tons of kids play soccer, and it's growing like crazy in terms of participation. I get that. But that's not pertinent to this issue. No. Again, you have a serious correlation-causation problem. Because soccer isn't popular here doesn't mean the league/cup system would be unpopular here (though I would not even remotely be in favor of importing it). There are many reasons soccer may not be popular here, and you have shown no nexus between soccer's unpopularity in the US and the league/cup system (I'd posit such nexus would be impossible to prove, as I don't believe most Americans are even aware of the simultaneous domestic cups and leagues). When you say "whatever that sport is doing, the American sporting public ain't buying" and use that for a reason the league/cup system would not work in the US, you are ostensibly saying that "soccer is played with 11 players a side, and soccer hasn't worked in America, so no sport with 11 players a side would work in America." Further, you can focus on MLS's TV deal, but that is really a red herring. The MLS is a middling league (minor league baseball has no major TV deal, does that mean baseball is unpopular?). The MLS's lack of a major TV deal simply proves that the MLS is unpopular on TV, not that soccer is unpopular on TV. The World Cup and Euros are featured on ESPN and ABC, and the EPL is now featured weekly on ESPN/2. The TV deal for the 2010 World Cup was worth $425 million in the United States. So much for the absence of a meaningful TV deal for soccer, huh?