We profile select group who've played for both clubs.
PAUL McSHANE (WBA 2006-07, SAFC 2007-09)
McShane joined the Baggies in summer 2006 from Manchester United, after playing for the Red Devils at youth level. In his single season at the Hawthorns, the defender was an integral part of the side that reached the play-off final, losing 1-0 to Derby County.
The Ireland international then moved to the Stadium of Light in the summer of 2007, making over 20 league appearances in the side’s first campaign back in the Premier League. McShane failed to hold down a regular place in the 2008-09 season before being loaned out to Hull City. McShane made the move to the KC Stadium permanent in the summer of 2009.
BERNT HAAS (SAFC 2001-02, WBA 2003-04)
Flying full-back Haas arrived on Wearside in 2001, moving from Swiss side Grasshopper Zurich. The Swiss international made 27 appearances in the 2001-02 campaign, with the Black Cats narrowly avoiding relegation. The following season, Haas did not play a single game for Sunderland and was loaned to FC Basel in his native Switzerland.
Haas made a permanent move to West Brom in the summer of 2003, and was a regular fixture in the side that gained promotion to the top flight. He is affectionately remembered by Baggies’ fans for his superb volley against Manchester United in a League Cup tie. Haas moved to French side Bastia on loan in 2005 before making the move permanent later that year.
DANNY DICHIO (SAFC 1998-2001, WBA 2001-04)
After spells in Italy with Sampdoria and Lecce, Dichio signed a permanent deal with Sunderland in 1998. Dichio helped the Black Cats achieve promotion to the top flight as Division One champions with a record-breaking 105 points. The striker also played some part in the following campaigns, where Sunderland finished seventh in 1999-2000 and 2000-01.
Dichio moved on loan to West Brom at the beginning of the 2001-02 season, scoring twice in three league games before making the move permanent in November 2001. He helped Albion achieve automatic promotion to the top flight. He finished as top scorer for the club in the 2002-03 season, but could not save the Baggies from relegation. After loan spells at Derby and Millwall, Dichio made a permanent move to the Den in 2004.
COLIN WEST (SAFC 1981-85, WBA 1989-92)
Wallsend-born West started his career at Roker Park in 1981, making his debut against West Brom, and played in several sides that battled against relegation. He scored three goals in two legs in the famous League Cup semi-final win against Chelsea in 1985 but was left out of the Wembley final. He moved to top flight rivals Watford shortly afterwards.
Following spells at Rangers and Sheffield Wednesday, West moved to West Brom in 1989, scoring 22 goals in 73 appearances. The Baggies suffered relegation to the Third Division for the first time in their history while West was at the club and the striker moved to Swansea City in August 1992.