After what until now has been a quiet and disappointing first season in the Premier League, US international Jozy Altidore won a penalty for Sunderland which resulted in the game winning goal as the Black Cats pulled off a huge 1-2 upset over Chelsea.
Manchester City dropped points in their attempt to close in on their Premier League title-chasing rivals, drawing 2-2 with Sunderland.
Sunderland suffered their fifth straight loss and all but solidified their fate as a relegated club in a 0-1 loss to Everton.
Sunderland took another dangerous step toward relegation with a 1-2 loss to West Ham United at the Stadium of Light this evening.
After trailing 2-0 during the second half, Gus Poyet turned to his bench for Adam Johnson and Sung-Yueng Ki, and the two would link up for the Black Cats only goal, but it was not enough in a 2-1 loss.
Struggling Sunderland have recalled striker Connor Wickham from his loan spell at Leeds as head coach Gus Poyet searches desperately for firepower.
Phil Bardsley received a late yellow card in Sunderland's 2-0 loss to Norwich.
Steven Fletcher will be missing for Sunderland this weekend due to injury.
Sunderland are awaiting scan results of the ankle Steven Fletcher injured in the Black Cats match with Crystal Palace over the weekend to determine how long the striker will be sidelined.
Crystal Palace remain three points clear of fellow Premier League strugglers Sunderland after a goalless draw at a windy Stadium of Light.
Leeds United have signed Sunderland striker Connor Wickham on loan until the end of the season.
Vito Mannone marked his return to the Emirates by watching four goals go past him as Sunderland lost 4-1 to the Italian keeper's former club Arsenal.
Emanuele Giaccherini has said that he is "happy" at Sunderland and does not plan on leaving at the end of the season.
Craig Gardner scored a wonderful goal that proved to be the match winner as Sunderland beat Southampton 1-0 in the FA Cup.
Sunderland's January arrival Santiago Vergini could gain his first league start against Manchester City.