Barrett had been on the Dolphins' reserve/retired list until he was waived this week
Watson is set to carry cap hits of $72.9 million for both the 2025 and 2026 seasons.
Gumbel's family said he died of cancer after more than 50 years of broadcasting.
Even if Barkley doesn't catch Dickerson, he can still become the ninth running back to get 2,000 yards in a season.