Two years after joining the club he made it into the first team, who earned promotion from the second division to the DDR-Oberliga, although Wosz would only play once, in 1986–87.

During the following four seasons he would amass 93 games (15 goals) until the Oberliga merged with the Bundesliga due to the German reunification.

Because the club finished fourth in the final East German football season, he was able to play twice in the 1991–92 UEFA Cup.

As captain, he led Bochum to its biggest success yet: the third round of the 1997–98 UEFA Cup which was lost 6–4 on aggregate to Ajax.

During his final season, 2006–07, Wosz only played one match, being substituted on for Zvjezdan Misimović in the 70th minute against Borussia Mönchengladbach.

[3] Wosz earned his first international cap for East Germany when he played against Finland on 22 March 1989 in Dresden.