How do Free Agent Pickups Work?
Each week you can add/drop as many golfer as you choose.
Prior to one hour before the first tee-times in a tourney you need to send an e-mail to the commish letting him know your intent. 
Pick Up a Free Agent
The commish will process the requests by round in the current pick up order (reverse order of Team Standings).
Each round will be processed in this order.
Examples of requests:
Drop golfera add golferx (only golferx will be added if available)
Drop golfera add golferx or golfery or ... (whichever is available).
Drop golfera/goflerb add golferx, golfery …(if available you get 2 golfers in order specifieD)
drop golfera,b,c,… addd x,y,z,… (you'll get as many as are available)
So make sure you request backup's if you want to get someone.