He has formerly played in the National Hockey League (NHL) with the Chicago Blackhawks and Dallas Stars.

[1] Prior to turning professional, Kero attended Michigan Technological University where he played four seasons of NCAA Division I hockey with the Michigan Tech Huskies, where he registered 55 goals, 56 assists, 111 points, and 67 penalty minutes in 153 games.

[3] On April 2, 2015, the Chicago Blackhawks of the National Hockey League (NHL) signed Kero to a two-year entry-level contract.

[6] Just 4 games later, he scored his first NHL goal on November 6, shooting past Cory Schneider, in a 4–2 loss against the New Jersey Devils.

[8] On June 24, 2018, Kero was traded to the Vancouver Canucks in exchange for Michael Chaput.