Sunderland have signed former Newcastle goalkeeper Steve Harper on a deal until the end of the season.
The 40-year-old, who had been without a club since leaving Hull in May, will be third choice behind Vito Mannone and Jordan Pickford.
Harper played 199 times for Sunderland's rivals Newcastle from 1993 to 2013.
"Steve will be a positive addition to our goalkeeping stable," said Sunderland boss Sam Allardyce.
"He has vast experience at the top level and that can only be beneficial to Vito and Jordan as they continue to develop."
Sunderland sold goalkeeper Costel Pantilimon to Watford this week.