Twenty years ago, Kevin Brown made baseball history when he signed the sport’s first $100 million contract; technically, a seven-year, $105 million deal with the Los Angeles Dodgers. Now? There have been 85 such deals, the most recent being Ronald Acuna’s eight-year, $100 million extension. For a long time, Alex Rodriguez held the honor of baseball’s loftiest contract at $252 million, and then he one-upped himself with a $275 million…