Clarke makes two enforced changes to his starting XICHRIS Brunt misses out through injury as Steve Clarke makes two enforced changes to the side that beat Sunderland 2-1 last weekend.
Graham Dorrans is elevated from the bench to take the Baggies skipper's place in midfield.
Romelu Lukaku is ineligible to play against his parent club, paving the way for Marc-Antoine Fortune to make his first start since New Year’s Day.
Academy star Isaiah Brown is named on the bench and will become the youngest-ever Barclays Premier League player at 16 years and 54 days if he comes on.
Jonas Olsson captains the side.
Goran Popov serves the final match of his three-game ban.
Rafa Benitez makes two changes to the Blues team that lost 2-0 to Manchester City in their last top-flight outing.
Cesar Azpilicueta and Oscar come in for benched duo Gary Cahill and John Obi Mikel.
CHELSEA (4-2-3-1): Cech; Azpilicueta, Ivanovic, Luiz, Cole; Ramires, Lampard (c); Hazard, Mata, Oscar; Ba. Subs: Turnbull (gk), Terry, Cahill, Bertrand, Mikel, Moses, Torres.
ALBION (4-2-3-1): Foster; Reid, McAuley, Olsson (c), Ridgewell; Yacob, Mulumbu; Fortune, Morrison, Dorrans; Long. Subs: Myhill (gk), Jones, Tamas, Brown, Odemwingie, Thomas, Rosenberg.
REFEREE: K Friend (Leicestershire).