Training camp is supposed to be the fun part. For the Falcons, it's turned into an urgent care waiting room. Tua Tagovailoa is dealing with a tight back, Michael Penix Jr. is still not practicing on a knee that hasn't cleared, and Atlanta just churned its quarterback depth chart twice in one afternoon.
Schefter broke the first domino: the Falcons waived Trevor Siemian with a non-football injury designation.
Falcons released veteran QB Trevor Siemian with a non-football injury designation.
Siemian's release wasn't random housekeeping. He'd been dealing with a calf issue that flared back up and kept him off the field for most of the offseason program, so with Atlanta suddenly needing a healthy body under center, keeping an injured camp arm on the roster stopped making sense. That opened a roster spot, and it didn't stay open long.
Within the hour, Schefter reported the Falcons were bringing in veteran Cooper Rush as insurance.

Rush, 32, spent 8 seasons as Dak Prescott's backup in Dallas before logging 4 games with the Ravens last season. He's not walking in expecting to start over Tua — he's walking in because Atlanta needed literally anyone who could take first-team reps without a doctor's note. That's how thin the room got in the span of a week.
It got thin enough that a UDFA was running the first-team offense at camp.

That's the part that actually stings a little — Jack Strand, a rookie free agent with zero regular-season snaps, taking first-team reps because the two guys ahead of him on the depth chart are both compromised. It's not a crisis Atlanta wants heading into a season where expectations are real, but it is very much the picture right now.
The good news, such as it is: nobody around the building is treating this as a long-term problem. Schefter reported the back issue isn't considered serious and Tua should be back next week, and Kevin Stefanski backed that up publicly, saying his quarterback will be "out there sooner rather than later." Penix, for his part, sounds encouraged too.
Penix described his knee as feeling good, but said he still has to be smart about avoiding a collision at camp.

Cooper Rush signing on doesn't move the needle on who Atlanta's Week 1 starter is — that's still Tua's job the moment his back cooperates. What it does is buy Stefanski a normal camp practice with a real quarterback under center instead of leaning entirely on a UDFA, while Tua and Penix rehab on their own clocks. Annoying, not alarming. Check back in a week.