During the 1941 season, Lawson was affiliated with five different team. He began the season with the Browns, but was traded to the Montreal Royals of the international League in April. After compiling a 0–3 record at Montreal, he was traded in June to the Atlanta Crackers. However, he refused to report to the Crackers. Upon being returned to Montreal, he was next traded to the Milwaukee Brewers of the American Association in July. He compiled a 1–2 record in five games for Milwaukee, and he then finished the 1941 season with the Nashville Vols with whom he compiled a 5–3 record and a 4.11 ERA. Lawson concluded his playing career in 1942 with the Milwaukee Brewers, compiling a 6–6 record and a 5.54 ERA.