Nationally, Anderson's talents did not go unnoticed. The Fridley, Minnesota native was recognized and selected to both the 2018 and 2019 Team USA World Junior Championships roster. In those two appearances, Anderson took home a silver and bronze medal. Notably, Anderson was also named the Caption of the 2019 Team USA roster in route to their silver medal.
After just 53 games with the Ontario Reign last season, Anderson was called up to the Kings. On February 29, 2020, in what will be a night never forgotten in the Anderson household, Mikey Anderson made his NHL debut against the New Jersey Devils and his brother, Joey, a 2016 third-round draft pick (NJD). Mikey recorded one shot and logged 18:59 of ice time in his NHL debut. Most importantly, Mikey got last laugh against the big bro as the Kings defeated the Devils 2-1 in overtime.