Walman has two seasons remaining on his three-year contract, which carries a $3.4 million average annual value and was signed with Detroit on February 28, 2023. Originally a third-round pick (No. 82) by the St. Louis Blues in the 2014 NHL Draft, Walman has totaled 51 points (25 goals, 26 assists) in 202 regular-season games with the Red Wings and Blues, and has played in one Stanley Cup Playoff game without recording a point.