Ibrahim Osman carved out an opening for fellow winger Patrick Roberts early on.
The Northern Irishman pulled out of the Arnold Palmer Invitational after experiencing back spasms.
Head coach Steve Borthwick has remained loyal to the overhauled backline that misfired against Italy.
Australia’s Beth Mooney and New Zealand’s Sophie Devine picked up record salaries of £210,000
Irish amateur and Gold Cup-winning rider clashed before the opening race on day two.