Press release from the Detroit Red Wings today - additional contract details are unknown at the current time, but will be added to this post as soon as they’re verified.
Update 1:
DETROIT - The Detroit Red Wings today signed right wing Anthony Mantha to a four-year contract.
Mantha, 26, completed his fourth full NHL campaign in 2019-20, and ranked among Red Wings leaders with 16 goals (3rd), 22 assists (T3rd) and 38 points (3rd) despite skating in only 43 of the team’s 71 games due to injury.