The Whitecaps canceled practice Wednesday and had a modified session for cleared players Thursday after players and staff reported gastrointestinal symptoms. The Whitecaps are scheduled to play the Seattle Sounders in a Cascadia Cup rivalry match at BC Place on Sunday.

Canada coach Jesse Marsch expressed outrage Friday that the Vancouver Whitecaps had been "poisoned" during their visit to Mexico for the CONCACAF Champions Cup final. The Whitecaps issued a statement Thursday saying about half of the 75 people who returned to Vancouver on the team's charter plane after Sunday's game had reported symptoms of a gastrointestinal illness.