You can trade for any draft pick or player that suits you while in connected franchise. First, start a franchise and create your coach. Then, press the button indicated on the home screen to create a new player. Next, create a coach or owner for the team that features the player you want to draft. Now, take control of that coach and set up the desired trade. When you have all of the picks and players you want, you can retire that coach or owner and return to your normal game with your ill-gotten team.