By Ross, I assume you mean Robby Scott.
Yes, Thornburg took a step back. Scott was already a long shot. His step back might be his last step.
Barnes is battling a hip injury, so he's an unknown.
I think Johnson took a step forward not sideways, but he was behind to begin with, so he gets more auditions to come with still a chance to win a slot.
My rankings after tonight (assuming 4 starters are Sale, Price & ERod/Porcello):
Lock (2-3): Kimbrel, Brasier and Barnes (if healthy)
Has to take steps back to not make it (2): Wright & Eovaldi
Bubble (2-3): Hembree, Workman & Poyner
Need steps forward to have a chance (3): Thornburg, Johnson, Velazquez
Maybe one back step away from being locked out (2): Kelly & Pom
Virtually no chance (2): Scott & Cuevas