The United States will be without superstar rookie and Calder Trophy finalist Auston Matthews for the World Championships.

The Toronto Maple Leafs forward and Scottsdale, Arizona native will pass on the annual international competition after an exhausting rookie campaign.

The top pick at the 2016 draft became available to the U.S. after the Leafs were eliminated from the first round of the Stanley Cup playoffs in six games at the hands of the Washington Capitals.

The 19-year-old draft led all rookies with 40 goals and 69 points - both Leafs franchise rookie records. He scored a goal in four straight postseason games as well.

Matthews played in all 82 games for the Leafs this season, participated in his first All-Star Game and also represented team North America at the World Cup of Hockey in September.

Chicago Blackhawks forward Patrick Kane also informed Team USA he will not play in France on Tuesday, according to ESPN.

Andersen also out

Maple Leafs goaltender Frederik Andersen will also skip the World Championships after turning down Team Denmark.

Andersen started a career-high 66 games in the regular season and started all six of the Maple Leafs' playoff games.

The 27-year-old sustained an upper-body injury playing for Denmark last summer.

He posted a 33-16-14 record in the regular season in the regular season with a 2.67 goals against average and a .918 save percentage.