Olympic swimming gold medallists Kaylee McKeown, Mollie O'Callaghan and Kyle Chalmers have had their struggles, two years out from the LA Games. Kaylee McKeown is back in action after being "wiped out" by glandular fever. Battered by illness and injury, a trio of Australian Olympic swimming stars are being backed to be ready for Los Angeles Games. Between them, Kaylee McKeown, Mollie O'Callaghan and Kyle Chalmers have won 11 Olympic gold medals.