The winger has yet to play a game this season but Keen insists he remains an important player for Albion, although Saturday's game is likely to come too soon for him.
"Jerome started training this week," he told the WBA website.
"Saturday may be a little bit early but depending on what happens this week, he could be in the gaffer's thoughts. He is going to be an important cog in what we're trying to do.
"He's an intelligent, bright, clever footballer and we want to try to play good football and create and make things happen.
"So I think he could be important for us."