Undrafted, he previously played college ice hockey for Bowling Green State University where he was twice named to the All-WCHA Second Team.

It was during his first full year with the Hurricanes that Walker committed to playing college ice hockey at Bowling Green State University.

His 13 points that season ranked second among Falcon rookies as he helped guide them to the 2014 WCHA Men's Ice Hockey Tournament.

[7] Following his senior year at Bowling Green University, Walker signed with the Ontario Reign of the American Hockey League (AHL) to begin his professional career.

Walker signed a two-year, entry-level contract with the Los Angeles Kings on July 3, 2018, after playing one season in the AHL.

He scored in the first period to help the Kings take the lead but the goal was called back due to goaltender interference.

[20] He skated in 70 games for the club, scoring 24 points as the Kings failed to make the 2020 Stanley Cup playoffs.

In the playoffs, Walker was utilised in a bottom pairing role with Colorado, going scoreless through 11 appearances.