He did not return. He surrendered two goals in the first 7:31 of play and the Panthers lost 2-1.
Thomas, who took a hiatus from hockey last year to spend more time with his family, joined the Panthers during training camp on a professional tryout before inking a one-year deal.
The 39-year-old former Conn Smythe Trophy winner has given up nine goals in three starts. He was yanked after allowing five in the Panthers' 7-0 shutout loss to the Blues Saturday night.
Information from The Associated Press was used in this report.