Club

In 1965, Mowlik began as an apprentice with LZS Orzepowice. In 1966, he signed as a professional with ROW Rybnik where he played until 1970. That year, he also briefly played for Unia Racibórz. In 1971, he joined Legia Warsaw where he played 131 games. He then transferred to Lech Poznań in 1977. In 1983, he moved to the United States where he joined the Pittsburgh Spirit of the Major Indoor Soccer League. He spent the 1985–86 season behind starter David Brcic, appearing in just one game. On 1 March 1986, the Spirit sold his contract to the Tacoma Stars and he played his first game in Tacoma four days later.^[2]

National

He earned 21 caps for the Poland national team and was a participant at the 1982 FIFA World Cup, where Poland won the bronze medal, and also at the 1976 Summer Olympics, where Poland won the silver medal.

International