If I successfully claim a dman, then Kevin Gravel will be placed on waivers.
It doesn't work that way. They specified you had to have the open roster spot AND contract spot in order to place a claim. Your waiver claim will probably be voided if you aren't at 22 or fewer players unless they are making changes/exceptions to the original rule. This rule applies to yourself, EDM, and VGK right now. OTT, CHI, and PHI have the roster space and contract space to make waiver claims. You can't see the players on waivers and then decide to claim them and open up a roster spot - that's why there was a roster freeze.