At the 1982 European Championships he reached the semi-final of the 100 metres but went on and helped win the bronze medal in the 4 x 100 metres relay with teammates Christian Zirkelbach, Peter Klein and Erwin Skamrahl.
He ran at the European Championships in Stuttgart in 1986, where he reached the 100 metre semi-final.
He then finished fifth at the 1987 World Championships and sixth at the 1988 Summer Olympics, both times in the relay.
This ranks him eleventh among German 100 m sprinters, behind Julien Reus, Frank Emmelmann, Thomas Schröder, Sven Matthes, Eugen Ray, Steffen Bringmann, Marc Blume and Alexander Kosenkow.
Christian Haas represented the sports team LAC Quelle Fürth.