MLB 10: The Show

Adjust sliders so you have max Power and Contact.

The key is not to miss any training goals. The ones that increase the attribute stats are important. You can miss the others. To get this the fastest, select first base and simulate every game. If you go 3-4 or 2-4 with a home run, save your RTTS from the save menu. If you go 0-4, don't save the game and reload your RTTS. The better your attribute stats, the longer period you can simulate. For example, if you buy training points from the PS store, and max out your power and contact numbers from the beginning, you can simulate 1-2 weeks at a time and have good stats. If you don't, you may have to do this one day at a time. Just remember to reload any cold streaks your player may have.

At the start of your second season, you should be in AAA. Most likely, you'll get called up in September if your stats are MVP quality and didn't miss your training goals. About 2 weeks before the end of the AAA season, create a save point.

If you don't get the call, and your player is having an MVP type year you can go back to your save point you created and replay the final two weeks. Keep doing this and you'll eventually get the call. I had to restart 5 times from that save point.