Most underpants worn during a marathon (male)
- Who
- Daniel Byrnes
- What
- 53 total number
- Where
- Australia (Sydney)
- When
- 31 August 2025
Age Restriction: Applications for this record title will only be accepted if the applicant is 16 years of age or over.
The most underpants worn during a marathon (male) is 53 and was achieved by Daniel Byrnes (Australia) at the TCS Sydney Marathon in Sydney, New South Wales, Australia on 31 August 2025.
Daniel wore all 53 pairs of underpants (in varying shapes and sizes) for the entirety of the TCS Sydney Marathon presented by ASICS. He was running to raise awareness for Bowel Cancer Australia, the leading community-funded charity dedicated to championing what matters most to people impacted by bowel cancer.