Bruce Mouat (Stirling, SCO) lost 10-5 to Niklas Edin (Karlstad, SWE) in the Final of the BKT Tires OK Tire World Men's Curling Championship, held April 2 - 11, 2021 in Calgary, Alberta. To advance to the championship game, Mouat won 5-3 over Sergei Glukhov (Moscow, RCF) in the semifinals of the 2021 BKT Tires OK Tire World Men's Curling Championship in Calgary, Alberta; and won 5-3 over Brendan Bottcher (Edmonton, CAN) in the quarterfinals. of the 2021 BKT Tires OK Tire World Men's Curling Championship in Calgary, Alberta;
 
Mouat finished 9-4 in the 0-team qualifying round. . In their opening game, Mouat lost 9-6 to Bottcher, then responded with a 7-2 win over Mads Noergaard (Hvidovre, DEN). Mouat won 9-4 against Jaap van Dorp (Zoetermeer, NED), then won 11-4 against Yeong Seok Jeong (Uijeongbu, KOR) and 10-1 against Qiang Zou (Harbin, CHN). Mouat went on to lose 6-5 against Edin. Mouat responded with a 9-8 win over Sixten Totzek (Fuessen, GER). Mouat won 6-3 against Yuta Matsumura (Tokoro, JPN), then won 7-4 against Peter De Cruz (Geneva, SUI). Mouat went on to lose 10-9 against John Shuster (Duluth, USA). Mouat responded with a 7-2 win over Joel Retornaz (Pinerolo, ITA). Mouat went on to lose 9-2 against Glukhov. Mouat responded with a 7-6 win over Steffen Walstad (Oppdal, NOR) in their final qualifying round match.
 
Mouat ranks 230th overall on the Year-to-Date rankings with 0.000 points earned so far this season.