The big difference between Tee or Trey holding out is that Tee is not under contract because he hasn't signed the franchise tag so he can't be fined for missing time. Trey, however, is under contract and can face pretty harsh fines if he were to skip out on training camp and any other mandatory practices. I believe these fines aren't even up to the team to dole out or not. If I recall, they are given by default based on the CBA and the team has no say in it.