[Curve Ball Dave]

You can create a custom league and edit all of the existing players to your liking. Or you can delete all of the existing players and create individual players in the Free Agent screen but it will take you forever and a day to do either. You can have no minors, no draft and turn off the financials, but you can't stop players from aging unless you just keep replaying the same season over and over. I don't know what your goal is with this. If the rosters never change and players don't develop for better or worse with age you'll get pretty much the same result every season.