Editor's note: Each week two Fantasy writers will debate a topic pertaining to Fantasy Baseball. Send your suggestions to DMFantasyBaseball@cbs.com and maybe two of our staffers will battle it out in a future Fantasy Faceoff!

What is your format of choice?
Brian Flood	Sergio Gonzalez
Mixed leagues are like Fantasy Baseball with training wheels. They're understandable for beginners or pedestrian baseball fans, but true fans should be digging deeper for sleepers and prospects. There are too many players to go around in a typical 12-team Fantasy league. Everyone basically winds up with an All-Star team. It's the equivalent of a Fantasy Football league that only has six teams. Now, in an AL- or NL-only league, owners have to research to find rookies and breakout players in order to be successful because the player pool is so much thinner. For example, in a mixed league a 20-plus HR hitter could be available on the waiver wire. That's just not how Fantasy baseball should work. Anyone who plays a significant amount of games should be owned in your Fantasy league. Players such as Joey Gathright and Francisco Liriano are valuable commodities in AL-only formats, but could be untouched in mixed leagues. Don't even get me started on the plethora of closers in mixed leagues. If you want to be able to follow players from both the National and American Leagues -- that's fine. Join two leagues! Mixed leagues don't allow owners to show off their true baseball knowledge.	Let's not forget what playing Fantasy sports is all about. Fun. Sure, limiting the player pool to AL-only or NL-only adds to the degree of difficulty with extra layers of strategy, but do you really need to cut off an entire league to do that? That's like amputating an extremity that is still fully functional. Before you go all Ronnie Lott on us, consider the fact that Fantasy owners who want those added tiers of tactical reasoning can get just that without shutting off half the realm of Major League Baseball. What it really boils down to is roster sizes. After all, size really does matter. Depending on the size of your league, you should accommodate roster sizes to include the level of talent you want to have available. Commissioners have the ability to be as liberal or conservative as they want with roster sizes. If you want a guy like Brian Schneider to be useful in your league, then make owners have to start three catchers for each scoring period. If you want to stoop to the level of a Dan Miceli, then require starting three or four relief pitchers. You can even incorporate middle relievers by adding holds as a rewarded stat. Who's to say starting between 5-10 outfielders is a sin? It's a free country. It's really up to the commissioner to establish the level of play he or she wants for any given league.