In his first season with FC Bayern, Rohr and his teammates barely missed out on the final round of the German Championship.

In his second season with the club, FC Bayern went on to defeat Eintracht Frankfurt in the final and claim its first German Championship with a 2–0 victory.

At the age of 19, Rohr received his first Germany national team call-up by German manager Otto Nerz.

Due to his numerous transfers, football magazine "Der Fußball" referred to Rohr as "the Gladiator, whom sells himself abroad."

It is unknown if he played at local club FC Sète during this time period; he was however, not listed on the players roster during the 1941–42 season.

In November 1942, he was sentenced to a three-month prison term after his arrest by French police in Marseille for "anti-French or communist propaganda."

After arriving at the Eastern Front, Rohr was permitted to join a German Army football team, enabling him to perform the one task he truly enjoyed; scoring goals.

Shortly before the end of the war, a German pilot recognized him from his football days and offered him a flight back to Germany.