Back when Vegas acquired Dadonov from Ottawa back on July 28, both the Golden Knights and the NHL had been led to believe that Dadonov's partial no-trade clause had either not been exercised correctly or had expired. As it turns out, that's not the case and Dadonov did file his no-trade list on time. That's not terribly important when it comes to the Ottawa-to-Vegas trade because Vegas wasn't on the list of teams he couldn't be traded to. Where this matters is that when Vegas attempted to trade Dadonov to Anaheim on Monday, they did so incorrectly believing Dadonov didn't have any no-trade protection. It now looks like he does and that's why his trade to Anaheim might be voided. If that happens, Vegas would be in a very awkward spot because they were moving Dadonov for cap reasons. The Golden Knights would still be able to trade him - or any player - despite the deadline being passed, but players who are dealt after the trade deadline can't play for the remainder of the 2021-22 campaign or in the postseason for any team that acquires them, so no contender would have any reason to trade with the Golden Knights at this point. Additionally, Vegas would have to adhere to Dadonov's no-trade list, further limiting their options.
nypost.com
