For San Jose both these guys will be outside the top 6 D when healthy. Toronto takes their $3.35M in actual salary and the penalty to bury Simek and move out Klingberg ($2M salary) and Lajoie (450k minor league salary). So San Jose saves $1M in real money which matters to their ownership.

Deal only happens if Tre knows he can resign him around the same money for 3-4years.

$2M for 4 years on Campbell is better than seven years of cap hits that look like this: $3.85M, $1.1M, $2.3M, $2.6M, $1.5M, $1.5M, $1.5M

Toronto essentially used the negative value here to be able to afford Bouchard.

From Edmonton's perspective Sammy could solve the problem in net (low risk as a pending UFA), McMann is someone they like, Jones is in the minors but can be another option in net if nothing else works. Also the 1st and $2M+ in cap space can help them get Tanev or another D. Timmins is also a hail Mary type lottery ticket for them.