sentences:  He made his debut on 12 September 1998 in a 2–1 home win against Liverpool coming on as a substitute for John Hartson.His first West Ham goal came on 22 November 1998 in a 2–0 away win against Derby County.Keller played 22 games in his first season in all competitions scoring five goals as West Ham finished in fifth place in the Premier League to qualify for the Intertoto Cup.