Here’s the rationale provided by AI:
(Oh boy, this feels too much like a caulfield post. I apologize in advance.)
The rule feels counterintuitive at first, but it’s really about leverage, player development, and keeping the amateur pipeline stable.
Here’s the rationale, step by step:
First, MLB wants a clear choice point for players.
High school seniors are at a natural decision moment: go pro now or go to college. If they’re drafted, they can sign and start their professional careers immediately. If they don’t like their draft position or bonus, they can choose college instead. That’s a clean fork in the road.
Once a player enrolls in a four-year college, MLB wants that choice to “stick” for a while. Making college freshmen draft-eligible would create chaos, with players constantly bouncing between college and pro ball after just a few months.
Second, it protects college baseball programs.
If freshmen were draft-eligible, top recruits could be drafted again immediately after arriving on campus. Coaches would have no roster stability. Imagine building a team around a freshman ace or shortstop, only to lose him to the draft six months later. The current rule ensures schools get at least three years of development and contribution from elite players.
Third, it balances bargaining power between players and teams.
High school players have leverage because they can threaten to go to college.
College juniors and draft-eligible sophomores have leverage because they can threaten to return to school.
College freshmen would have almost no leverage. They’d already be enrolled, already used a year of eligibility, and wouldn’t yet have proven themselves at the college level. MLB teams could draft them cheaply, which is something the players’ union historically wanted to avoid.
Fourth, it encourages development rather than churn.
MLB prefers that players either:
enter pro ball immediately out of high school, or
spend meaningful time developing physically and mentally in college.
A single freshman year often isn’t enough to evaluate true growth, and allowing drafting after just one college season would push teams toward speculation rather than development.
Finally, the three-year rule creates a predictable system.
A player at a four-year college becomes draft-eligible after:
their junior year, or
turning 21 years old.
That gives MLB scouts, colleges, and players a shared timeline. Predictability matters in a system that spans thousands of players and dozens of levels of baseball.