What happened: New England auditioned San Diego State product Hall and Michigan State product Spencer at defensive back. Darren Hall was released from Falcons injured reserve Sept. 8 after stints with Atlanta and Arizona.

Why it matters: Carlton Davis was absent from Thursday practice access with a neck issue, thinning the cornerback group. A workout look gives New England a ready defensive-back option without committing a roster spot.

What to watch: Watch Davis' practice status and whether Hall or Spencer earns a practice-squad deal.