Strasburg is a monster in this game, I usually lock him up for 10 years at the start of the game. I package Gio for some outfielder as I never get the "good" Gio in this game.. his control is kind of low.
Edwin and Jordan are worth keeping for 5 or so years.
And a tip for 1B after you void LaRoche last contract year is Anthony Rizzo, HR machine.