Caig joined the Premiership outfit from SPL side Hibernian in 2002 and whilst failing to break into Sir Bobby Robson's first-team setup, he has provided cover on European trips for Shay Given and Steve Harper.
The Whitehaven-born custodian began his career at Carlisle and spent seven years in Cumbria before moving to Blackpool in 1999.
A brief stint at Charlton followed before Caig moved again to enjoy an impressive spell with Hibernian.
The 29-year-old will be hoping to do enough this season to earn another contract with the North East outfit.
