The issue is that he might be able to blow people away with just a fastball in 1-inning stints. Sanchez might be the 3rd best reliever on the team. You don't want to waste him in AA in a contention year if you can get 70 good innings. Especially when he's a long shot to be an effective starter.
7x7, 12 team draft March 16 at 7ET. It's a league with people who have no idea what they're doing, and hilarity is likely to ensue. If you're a sadist and this appeals to you, let me know.