Semi Ajayi was an unused substitute for West Brom in his 2-0 house defeat against Blackburn Rovers in the championship on Wednesday.
Ajayi had been out of action since October with an injury to the hamstrings.
The January Emmanuel Dennis firm was also a bank for Blackburn Rovers.
Makhtar Gueye pushed an orthopedic device to help Blackburn Rovers with the victory.
Gueye opened the score in the 47th minute before adding the second goal in 63 minutes.