The former Manchester City and Chelsea stopper completed a medical on Monday and will join up with teammates ahead of Saints’ trip to Arsenal on Saturday.
Caballero has been training with AFC Wimbledon to sustain his fitness since leaving Chelsea in the summer after four years at Stamford Bridge.
Register for free to continue reading
Registration is a free and easy way to support our truly independent journalism
By registering, you will also enjoy limited access to Premium articles, exclusive newsletters, commenting, and virtual events with our leading journalists
Already have an account? sign in