Jermain Defoe ended the contest before the break with a smart quickfire double - his 13th and 14th league goals of the season - as Sunderland ran riot against a team managed by their former boss Sam Allardyce.
Sunderland remained bottom of the table but climbed level on points with 19th-placed Palace who have won just once in 10 league games.
(Reporting by Tom Hayward, editing by Ed Osmond)
Share
