What happened: Davison's return comes one day after New England moved on from him in a separate practice-squad transaction. Zylstra had joined New England's practice squad earlier this month.
Why it matters: The swap resets reserve depth on opposite sides of the roster as New England continues its early-season churn. Davison gives the Patriots another safety option again, while Zylstra's departure reduces tight end depth on the practice squad.
By the numbers: Davison was released on Sept. 14 and re-signed on Sept. 15. Zylstra was added to the practice squad on Sept. 2 and released on Sept. 15.
What to watch: The next practice-squad update will show whether New England fills the newly opened spot or keeps flexibility for another move. Davison's status is also worth tracking when the Patriots make their next round of roster decisions.