Isles have used 44/50 contracts with no pending RFAs to sign, so they have the space to sign like 2 more players as most teams like to have at least 3-4 spots open heading into the season just in case to add players or sign their NCAA players after their seasons are done.
Figure most of these UFAs would ideally target somewhere close to home, if they are from the NE USA. Any of Phi, Bos, NYI, NJ, NYR, Pit, Was, Buf make sense given their AHL clubs are fairly close to the NHL team. They are going to be spending 23-24 in the A.