Langford's contract isn't a good asset. The Spurs have a bunch of cap space and don't need to send out matching salary. I can't think of many scenarios where a team would rather pay all or some of Langford's contract over getting a full TE. Even in those scenarios, the Spurs can acquire and immediately trade another such contract from a team since they're under the cap. The only think Romeo has going for him over KBD and Roby is his option value next summer. The Spurs would have RFA rights over Langford whereas those others are UFAs. Similarly, Roby can be extended this year while KBD cannot. Neither situation really matters though. I don't see how Langford isn't cut. Wieskamp is probably the 15th man.
Jones, Primo, Wesley
Vassell, Richardson, Branham
KBD, McDermott, Wieskamp
Johnson, Roby, Sochan
Poeltl, Collins, Dieng
TW: Barlow, Hall
Even though he could play, I can totally see Sochan joining Wesley and Branham in Austin this year. While I think it's a huge priority to develop the young players, developing/showcasing the young vets also matters. That rotation actually makes a fair bit of sense, and if the vets end up getting traded, it should leave room for the others to ascend later in the season.