What is confirmed
Loomis spoke at a Wednesday press conference. The Saints posted his words on Tyson directly: "He's improving, but he is not going to practice this week." Underdog NFL and ProFootballTalk carried the same update, with Tyson's injury listed as a hamstring.
That rules Tyson out of Sunday's game against the Pittsburgh Steelers at Stade de France outside Paris, since he can't play without practicing first. The Saints have a bye the following week, and their next game after that is a home date with the Cleveland Browns on Nov. 8. That is now the earliest realistic debut.
What is less certain
Loomis would not give a specific timetable. ProFootballTalk quoted him saying "we feel like we're getting closer," and noted that Tyson has been out since a hamstring injury in mid-August. Head coach Kellen Moore has said this one is unrelated to the hamstring trouble Tyson had in college, but a player who has missed all of training camp and every game so far will likely need a ramp-up once he does practice.
The Saints have been winning without him. Chris Olave, Alvin Kamara and Bryce Lance caught touchdown passes in Sunday's 34-27 win over the Giants.
What RSO owners should do now
If you hold Tyson, nothing changes your plan except the calendar. He is a first-round pick on a rookie deal, so his value in dynasty and contract leagues is about the years ahead, and a lost first half does not change his long-term outlook much. Keep him on IR or your taxi squad if your league allows it, and don't sell him at a discount to managers chasing this week's points.