The younger brother of another footballer, Klaus Allofs, he was a prolific goalscorer, scoring nearly 200 overall goals as a professional, always playing in the Bundesliga (a brief spell in France notwithstanding).
FC Kaiserslautern, where he proceeded to score at an impressive rate (an average of 15 per season), although the team did not win any silverware.
FC Köln, rejoining with his brother in 1986–87, and being crowned the league's top scorer in his third season, with the team finishing second.
Allofs wrapped up his career in 1992 at his first club, after an unassuming five-month stint in France with RC Strasbourg in the 1989–90 season.
Allofs was an uncapped (an unused) member for West Germany in the 1982 FIFA World Cup campaign, which ended with runner-up honours.