DFF
Draft Friends Forever!!!
Honestly, I would work out with every and any team, not matter what one team tells me.
Who knows, a better team with a higher pick (more money) might like the player enough to pick them after a good workout.
This makes sense for a player who is a lock for the first round.
I think promises only really make sense for first round bubble players. There is much more of a difference between the guaranteed money of a first round pick and the contract of a second round pick, than there is between say, the 18th pick and 27th pick.
So, if you feel there is any chance of slipping to the second round, and a team offers a guarantee that they will pick you if you cancel all other workouts, then it makes a lot of sense to do that.
It is the same mindset of signing a contract in your last year before before becoming a free agent for a slight discount. Yes, you may have lost a little money, but you also gain the piece of mind, in case you get injured, or struggle, etc.
And even though these promises aren't legally binding, they are pretty close to it, since agents run this league, and the second a GM screws over an agent like that, they are going to have a whole lot of trouble getting anything done in the future.