As a member of the Australian men's relay team, he won gold in the 4×100-metre medley (as a heat swimmer) and bronze in the 4×200-metre freestyle.

In September 2011, Monk was involved in an accident that put his 2011/2012 season in doubt, in which he fractured his elbow in two places during the leadup to the 2012 Olympic Games.

[8] As a result of making a false statement to police, Monk faced a possible $10,000 fine, three-year jail term and disciplinary action from Swimming Australia.

In response, the president of the Queensland Police Union spoke out against the decision, arguing against Swimming Australia's defence of Monk, and stated that "The public rightly expect that no one should deliberately waste the time of police, whether they be wannabe B-grade celebrity athletes like this modern-day 'boy who cried wolf', Kenrick Monk, or just regular people.

"[10] In June 2012, Kenrick Monk and Nick D'Arcy published a picture on Facebook where they were holding automatic pistols and pump-action shotguns, drawing extended criticism.