Lonergan will travel to America with the Reds’ squad on Tuesday to help cover a temporary shortage in the goalkeeping department in training, with Simon Mignolet currently the club’s sole available senior stopper.
Alisson Becker is on holiday following his Copa America triumph with Brazil, Kamil Grabara has joined Huddersfield Town on loan after signing a new long-term deal with Liverpool, Caoimhin Kelleher is recovering from minor wrist surgery, and Vitezslav Jaros is sidelined with an elbow injury.
Dan Atherton came on for Mignolet during Sunday’s 3-1 friendly win over Bradford City, and first-team goalkeeping coach Achterberg has decided to bring in 35-year-old Lonergan, who left Middlesbrough earlier this summer, for the trip to the US.