[1] He then enjoyed a highly productive 1973-74 season with the Kingston Canadians of the Ontario Junior Hockey League, tallying 33 goals and 47 assists in 62 contests.

[2] Holst then continued his scoring pace the following season with 33 goals and 37 assists in 62 games for the Winston-Salem Polar Twins of the Southern Hockey League.

He made his NHL debut with the New York Rangers during the 1975-76 season and mostly spent time with their affiliate in the American Hockey League (AHL), the Providence Reds, tallying 37 goals and 44 assists in 69 games that season en route to AHL Rookie of the Year honors.

[5] He took over the head coaching job at HC TWK Innsbruck in December 2008 and remained in that position until the remainder of the season.

Holst served as head coach of Ritten Sport of the Italian Serie A in 2011-12[6] and returned to EC VSV in June 2015 to become director of the club's youth program.