Domestically, he won the decathlon event at the 2017 Canadian Track and Field Championships, albeit in the absence of then-reigning Olympic bronze medalist Damian Warner.

[1] In June of the 2019 season, LePage scored 8453 points to win the Décastar meeting in Talence, France, obtaining the qualifying standard for both the Olympics and World Championships.

[15] At the 2022 World Athletics Championships, LePage finished the first day of the decathlon in second place, after Warner was forced to withdraw because of a hamstring injury.

"[17] LePage was initially named to the Canadian team for the 2022 Commonwealth Games, but withdrew after the World Championships, with Athletics Canada citing a need "to properly recover and prepare for the rest of the season.

"[18] At the 2023 Hypo-Meeting, LePage set new personal bests in both the 100 m and the javelin throw, winning the gold medal in an upset victory over Warner, the seven-time and defending champion.

[19] Competing at the 2023 World Athletics Championships, LePage excelled on the first day of the decathlon, and was in second place at the halfway point of the event, ahead of Warner and behind German Leo Neugebauer.

[20] LePage began the second day with a new personal best 13.77 in the 110 m hurdles, taking the overall lead from Neugebauer, which he would retain for the remainder of the event, which included his second-best javelin mark ever (60.90 m).

His 8909 points were a new personal best, the sixth-highest in history, and the second-best winning margin at a World Athletics Championships after Ashton Eaton's 2015 event record.

LePage revealed he had persevered through a couple of "close calls" with injury during the event, and said that "I've done so many decathlons with Damian and we're always supporting each other, so it's nice to share this podium with him.

He was initially projected to be able to recovery in time to participate in the 2024 Summer Olympics in Paris, but was ultimately forced to withdraw from the event in late July.