Few things:
1. It's a make or break year for him. Really should be for any WR that is 3 through 6 on the depth chart.
2. It's fully expected and reasonable that a late round WR who flashes enough to make the 53, should be largely invisible throughout the year.
3. I'd say that the real battle is with Moore and whomever Seattle adds to the WR room. Ursua needs to make the 2nd year leap. Which is entirely possible.
Turner is an exclusive rights UFA. Moore is an RFA. I'd expect Moore to get an original round tender (7th round) and possibly get signed off the squad. This is a great WR class, and there is room to get upgrades to all three at the back end (Moore, Turner and Ursua). Given that, a lot of teams are going to solve WR issues via the draft so Moore could be safe if exposed.
Jaron Brown was #3. He's a UFA and I don't expect him back. Additionally, Lockett is midway through his 2nd deal. His deal is going to explode in 2020. The way it's structured, it looks like Seattle will have a choice to make in 2021 if they get tight on cap (he'll provide 10m+ relief if released).
Looking at the group, there really is a lot of room to add upgrades here. I'd kind of be shocked if we don't add 2 guys immediately. One slated to compete right away for WR3. One slated to compete for a starting role in 2021.
Ursua, if he makes the leap can already be either. Drafting 2 WRs this class, really hedges the group nicely. We have WR6 spot open. And as many as 3 additional WR spots that can be upgraded/turned over with no cap consequence. Both Turner and Moore could also be retained and fill the bench as they've already done.
Seattle needs a chain mover. This is a good class to acquire one. And our depth is largely seasoned with one year remaining (Moore/Turner) or untested (Ursua). Perfect time to add day 2/3 guys. And in this class those guys will have exceptional value relative to other draft classes.