Detroit Red Wings
On October 12, 2013, the Detroit Red Wings signed Mantha to a three-year entry-level contract. [10]
Mantha began the 2014–15 season on the injured reserve list, after fracturing his right tibia on September 15, during a game at the Traverse City Prospect Tournament. It was announced he would be out for six to eight weeks. [11] He made his professional debut for the Grand Rapids Griffins on November 14, 2014, in a game against the Texas Stars. He became the second-highest Detroit draft pick to play for the Griffins, behind only Jakub Kindl (19th overall in 2005). [12] In his second AHL game, also against the Texas Stars, he scored his first professional goal against Jussi Rynnäs. [13]
On February 17, 2016, Mantha recorded his first career hat-trick in a game against the Milwaukee Admirals. [14]
On March 14, 2016, Mantha was recalled by the Detroit Red Wings. Prior to being recalled, he ranked third on the Griffins in scoring with 21 goals and 24 assists in 56 games. [15] He made his NHL debut the following day in a game against the Philadelphia Flyers. [16] On March 24, he scored first career NHL goal against Ben Scrivens of the Montreal Canadiens. [17] On April 10, he was returned to the Griffins. Mantha played 10 games for the Red Wings, recording two goals, one assist and 18 shots on goal while averaging 11:42 time on ice. [18]
On November 11, 2016, Mantha was recalled by the Red Wings. Prior to being recalled, he was tied for the AHL lead in goals with eight goals in 10 games. He also led the Griffins in points (10), power-play goals (4) and shots (34). [19]
On October 5, 2017, Mantha scored the first goal at Little Caesars Arena, with an assist from captain Henrik Zetterberg. [20] On March 31, 2019, Mantha recorded his first career NHL hat-trick in a game against the Boston Bruins. [21]
On October 6, 2019, Mantha scored four goals in Detroit's 2019–20 home opener against the Dallas Stars, including a natural hat-trick. He became the second player in franchise history to score four or more goals in a home opener, and the first since John Sorrell in 1933. He also became the 23rd different player in franchise history with a four-goal game, and the first since Johan Franzén in 2011. Mantha was named NHL's Second Star of the Week on October 8, 2019. [22]
On November 3, 2020, the Red Wings signed Mantha to a four-year, $22.8 million contract. [23]
Washington Capitals
On April 12, 2021, Mantha was traded to the Washington Capitals in exchange for Jakub Vrána, Richard Pánik, a first-round pick in 2021 and second-round pick in 2022. [24]
On April 18, 2021, Mantha became the first Washington Capital in history to score a goal in each of his first four games with the club. [25] [26]
On December 13, 2022, Mantha assisted on Alexander Ovechkin's 800th career goal making Ovechkin the third player in NHL history to reach 800 career goals. [27]
Canada 
