[5] Regula improved offensively the following season and accumulate four goals with 17 assists[1] to be honored with second-team Division 3 all-state accolades.
[6] Following his sophomore season, Regula was drafted in the fourth round, 74th overall, by the London Knights of the Ontario Hockey League (OHL).
[7] Despite this, Regula played 53 games at right defense with the Chicago Steel of the United States Hockey League before joining the Knights.
[12] He was then invited to attend the Red Wings Development Camp[13] before returning to the Knights as co-captain alongside Liam Foudy.
[16] As an impending restricted free agent following the completion of his entry-level contract with the Blackhawks, Regula and Ian Mitchell were traded to the Boston Bruins, in exchange for Nick Foligno and Taylor Hall on June 26, 2023.