'While Ben Mezrich has been quoted as saying that Micky Rosa was a composite of myself, J.P.
Massar were also very much the basis for 21's Micky Rosa. Arguably, the most notable is Bill Kaplan, a Harvard Business school graduate who had also done his undergraduate studies at Harvard.
The 21 true story reveals that the real MIT Blackjack Team was led by three individuals, none of whom were professors. In the movie 21, an unorthodox math professor named Micky Rosa (Kevin Spacey) leads the team.
