[3] He was traded mid-season to Windsor on January 10, 2013, and in his last season, he set a career high and recorded 15 goals and 53 points, and finished with a +44 rating and 51 penalty minutes.

Koekkoek made his NHL debut with the Tampa Bay Lightning on March 31, 2015, in his home province of Ontario losing 3–1 against the Toronto Maple Leafs recording 2 shots and a –1 rating.

"[7] On April 8, 2015, the Tampa Bay Lightning announced that Koekkoek had been reassigned to the Syracuse Crunch of the American Hockey League.

On March 15, 2023, Koekkoek revealed via his LinkedIn profile that he had stepped away from hockey "because my life inside of it had gotten to a place that was unbearable and unhealthy towards my mental health".

[17] Koekkoek first competed at the international stage at the 2011 World U-17 Hockey Challenge in helping Canada Ontario claim the gold medal.

[18] Koekkoek represented the Canadian under-18 national team at the 2011 IIHF World U18 Championships, where he had two points in seven games and helped Canada win bronze medals.

In the 2011 Ivan Hlinka Memorial Tournament, Koekkoek served as an alternate captain, where he led Canada to the gold medal with his defensive scoring with five points in five games.