MLB Life is a mode that lets you experience life in the big leagues. It is only available in the 2008 version of MLB Power Pros. There are 3 modes of MLB Life:

Dream Player Mode:

Be your favorite player! 'Nuff said!

Created Player Mode:

Create your own player and choose his team and two abilities, plus one drawback, and appearance, etc.

Success Player Mode:

Finish your Success Mode player and play with him in the major leagues.

Find out what Success Mode is what this link.