At the 2017 Scottish Junior Curling Championships, he played lead on the team that also included third Callum Kinnear and second Ryan McCormack.

[3] After the event, McFadzean was invited to join Team Whyte at the 2018 World Junior Curling Championships as their alternate.

[8] Out of juniors, McFadzean moved to second on Team Whyte with Euan Kyle and Robin Brydone rounding out the lineup at lead and third respectively.

[13] Team Whyte had a strong start to the 2021–22 season, reaching the final of the 2021 Euro Super Series where they lost to Yannick Schwaller.

[14] After a quarterfinal finish in their second event, they won the KW Fall Classic with an unbeaten record, defeating fellow Scotts Team Ross Paterson in the final.

[16] With the points they accumulated from the first part of the season, Team Whyte qualified for the 2021 Masters, their first Grand Slam of Curling event.

They turned things around in November, however, winning the Swiss Cup Basel and the Original 16 Tour Bonspiel in back-to-back weeks.

Back in Scotland, the team had a strong start to the Scottish championship, sitting 6–0 with one round robin game left to play.

[27][28] The Whyte rink came out of the gate strong to begin the 2023–24 season, reaching the semifinals of the 2023 Baden Masters before losing consecutive finals at the 2023 Euro Super Series and the 2023 Stu Sells Oakville Tankard to Team Mouat.

[29][30] In their fourth event, they succeeded in capturing the 2023 AMJ Campbell Shorty Jenkins Classic, defeating Niklas Edin in the championship game.

They then defeated Team Edin to qualify before upsetting Brad Gushue and Yannick Schwaller in the quarterfinals and semifinals to reach their first Slam final.

[34] In their next two events, the team lost in the final and semifinals of the 2024 Mercure Perth Masters and 2024 Canadian Open respectively, both to the Mouat rink.

At the 2023 championship, the team finished first through their round robin pool and then won both their quarterfinal and semifinal matches to advance to the final.

[41] They then beat Lisa Davie and Mark Watt 9–3 to claim the Scottish title and a trip to the 2024 World Mixed Doubles Curling Championship.

[42] At Worlds, the team had a slow start, losing three of their first five games before winning four straight to secure a spot in the playoff round.