The assembling of a 40-man roster for every MLB team can at times be a major balancing act.
Any player signed to a major league contract is automatically placed on the 40-man roster, which includes players already on the 25-man roster. Minor league prospects who signed a major league contract but are toiling away in the minors are on the 40-man roster as well.
The vast majority of prospects drafted are not signed to a major league contract. In fact, of all the prospects drafted between 2001 and 2010, only 31 of them signed major league contracts, and 16 of them were college pitchers.
It doesn't make much sense for high school players to even consider a major league contract. For one, it automatically starts their minor league options, meaning they've already used one of their three minor league options as soon as they begin their professional career. It also means their path to the majors will be on an accelerated course—not always the best option.
Here is a look at each MLB team's top prospect at the start of the 2013 season.