There are many different formats and league sizes in the fantasy baseball market, especially in auctions. I’ve played in American League and National League formats with 12 teams plus 15-team mixed leagues. Each league could also have keepers (players held for more than one year) or trading, which changes all players' value during the auction. Over the last 19 seasons, I’ve played in the high-stakes fantasy market where there is no trading, which puts pressure on a fantasy manager to develop a winning plan before the auction.
When doing an auction league with no trading, a fantasy manager has a small margin for error.