So it turned out both Manson & CDH are available.
Anyways, notable defensemen available:
Anaheim-Vatanen (26) $4,875,000 (UFA 2020) (RD)
Anaheim-Manson (25) $825,000 (RFA 2018) (RD)
Buffalo-Bogosian (26) $5,142,857 (UFA 2020) (RD)
Chicago-Van Riemsdyk (25) $825,000 (RFA 2018) (RD)
Columbus-Johnson (30) $4,357,143 (UFA 2018) (LD)
Colorado-Wiercioch (26) $800,000 (RFA 2017) (LD)
Dallas-Hamhuis (34) $3,750,000 (UFA 2018) (LD)
Dallas-Oleksiak (24) $918,750 (RFA 2017) (LD)
Detroit-Ouellet (23) $715,000 (RFA 2017) (LD)
Florida-Demers (29) $4,500,000 (UFA 2021) (RD)
L.A.-McNabb (26) $1,700,000 (UFA 2018) (LD)
Minnesota-Dumba (22) $2,550,000 (RFA 2018) (RD)
N.Y.I.-De Haan (26) $1,966,667 (RFA 2017) (LD)
Tampa-Koekkoek (23) $894,167 (RFA 2017) (LD)
Washington-Schmidt (25) $812,500 (RFA 2017) (LD)
Lots of quality defensemen. Still hoping a deal for CDH or Oullet becomes reality for the Jets.