Last year, word spread in the middle of the monthlong contest that during the game's initial loading screen, gamers could switch out opposing hitters for weaker ones off the bench and still preserve the Million Dollar Challenge logo (seen above in an image from last year's contest) that certified the game was being pitched in accordance with the official rules. The contest is predicated on using real-life lineups and pitching matchups for the current day in attempting to throw a perfect game, which is a contest of at least nine innings in which one pitcher retires every opposing batter without any reaching base for any reason.
Today, I started a game under the Million Dollar Challenge menu option and as soon as I pressed start to go the substitution menu in the loading screen, I lost the official logo. According to the contest's official rules, you may not pause the game, substitute any player on either team, make a mound visit, or delay the game longer than 10 seconds between pitches.
Last year, however, at least one of the eight finalists under the contest's rules at the time admitted to altering his opponent's lineups in his perfect game attempts. He was exploiting not only a loophole in the game's code but also in the contest's official rules, which did not expressly forbid altering lineups even though 2K Sports community staff told gamers, via social media, that it was not allowed.
The contest is being held under its fourth different format in as many years. Qualifying perfect games will be scored according to their level of perfection—in other words, the degree of difficulty in the matchup, the number of strikeouts thrown, and the number of pitches thrown (fewer are better) will affect its rating. The best perfect game thrown with each of Major League Baseball's 30 teams will net its hurler $25,000. The top four pitchers will be flown to New York to compete in a mini-tournament for a $250,000 grand prize. The full rules are at the link.
Million Dollar Challenge [Official site]