No...his momentum took him backwards and his velocity was aided at the end by Nwosu's tackle.
If you want to say forward progress counts at the time of Nwosu's contact, that does not align with the rules being disucssed:
"
Player retreats on their own: If a player runs
backward on their own, the ball is
spotted where they were tackled, and
they don't get the benefit of forward progress"
Was he running backward on his own?
Yes (nullifies forward progress rule)
Was he tackled?
Yes
Where is the ball spotted when tackled?
Ball location when a non-hand/foot contacts the ground during the tackle (unless forward progress rule applies, which in this case it does not b/c at no time during the tackle was the ball carrier moving forward).
As previously pointed out ad-nauseum...this is a safety.
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