The Ottawa Senators will lose a first-round draft pick thanks to their involvement in multiple trades involving right-winger Evgenii Dadonov in 2021 and 2022.

The NHL announced Ottawa must choose whether it will give up its 2024, 2025 or 2026 first-round pick within 24 hours of the end of this year's draft lottery.

As hockey insider Frank Seravalli explained, the decision was made because the Senators didn't supply a correct no-trade list during a sequence that saw Dadonov traded from Ottawa to the Vegas Golden Knights in July 2021 and then from the Golden Knights to the Anaheim Ducks in March 2022.

The latter trade was invalidated.

TSN provided more details, noting Ottawa did not tell Vegas that Dadonov had a 10-team no-trade clause in the contract he signed with the Senators when the two teams completed the 2021 trade.

It turns out the Ducks were on that no-trade list when the Golden Knights then traded him to Anaheim in 2022 for defenseman John Moore and Ryan Kesler's contract. As a result, the league invalidated the trade and prevented Dadonov from being moved to Anaheim.

Vegas released a statement Wednesday:

Dadonov has bounced around some during his career, playing for the Florida Panthers, Senators, Golden Knights, Dallas Stars and Montreal Canadiens. He currently plays for Dallas and has appeared in all seven of the team's games this season with two goals and one assist.

The Stars landed him in a trade with the Canadiens last season and then signed him to a two-year contract extension this past offseason.

It was Dadonov's old team in the Golden Knights that eliminated his Stars in the Western Conference Final last season. Vegas went on to win the Stanley Cup Final over the Panthers, another one of the right-winger's former teams.

Ultimately, the ordeal ended up costing the Senators in the future, as they will have one fewer first-round draft pick to use as they attempt to establish themselves as long-term contenders in the Eastern Conference.