Once the schedule is generated, your team will be assigned 6 AAA hitters and 2 AAA pitchers.
The AAA players are based on real players in the SIM with salaries of about $1.5M - $2.6M for batters and $700K - $1.8M for pitchers
What most of us in this theme do is draft 8 real life scrubs ($200K players) and send them down for the AAA players, since the AAA players can have some value in a low cap league like this one ($80M).