Major League Baseball 2K9
50 Achievements
Unhittable
Don't give up any hits in a game
4.8%
How to unlock the Unhittable achievement in Major League Baseball 2K9 - Definitive Guide
2) Play a ranked match with a friend and just have them stand there as you strike em all out (I got the achievement using THIS method)
3) Boost your sliders so that you are better at fielding and pitching and beat up on the computer (though this isn't a guarantee, and I got this achievement before I could test this method, I do not promise it works).
The instructions given here should help you unlock 21 trophies very quickly.
First of all, pick the team you wish to use for every trophy. It's best to choose one and stick with it. Edit all the stats of Batters and Pitchers so that every player is maxed out. Then trade someone for Tim Lincecum (Giants) and max his stats. Next, choose a team to play against. Lower every player's stats to 0. You're ready for the easiest game of your life. Start a 9 inning exhibition game and go to the Options screen. Under Difficulty, max out all your stats except Field Errors and do the opposite for the CPU.
Get as many home runs, strike outs and stolen bases as you can. Use the same pitcher throughout the game and save after every perfect inning. If you allow a hit, reload the game. When you get down to the last out, save the game again. Reload the game and complete it. Reload and complete the game as many times as it takes to unlock all the home run, strike out and stolen base trophies. This method will also allow you to unlock 'Flawless', 'Unhittable' and 'Untouchable'.
Don't forget to either place Lincecum in your lineup or bring him in as a pinch hitter. You should hit a home run with him at some point in the game without a problem.