Give a stream of consciousness and then the final answer. The first amateur draft was held in 1965. Unlike most sports drafts, the first-year player draft is held mid-season, in June. Another distinguishing feature of this draft in comparison with those of other North American major professional sports leagues is its sheer size: under the current collective bargaining agreement the draft lasts 40 rounds, plus compensatory picks. In contrast, the NFL draft lasts for seven rounds (a maximum of 256 selections), the NHL entry draft lasts seven rounds and roughly 215 picks, and the NBA draft lasts for only two rounds (60 selections).

Answer this question: hiw many rounds are in the mlb draft?
This is the relevant information: Another distinguishing feature of this draft in comparison with those of other North American major professional sports leagues is its sheer size: under the current collective bargaining agreement the draft lasts 40 rounds, plus compensatory picks.
So, the final answer is 40.