American Michael Weiss raced the men's 800-metre freestyle relay with tape wrapped around fingers he'd injured during the 200-metre freestyle earlier in the night. FINA rules state no tape can be worn unless approved the Sport Medicine Committee.
The event's medal ceremony was postponed until Thursday, while the U.S. successfully appealed their disqualification.
Brazil won gold. The Canadian team of Victoria's Ryan Cochrane and Jeremy Bagshaw, Stefan Milosevic of Burnaby, B.C., and Alec Page of Cortes Island, B.C., were bumped to the bronze medal.
The Canadian swim team's medal total remained a Games-leading 13 with five gold, six silver and a pair of bronze.