Leslie William "Toots" Tietje (September 11, 1910 – October 2, 1996) was an American professional baseball pitcher with the Chicago White Sox and St. Louis Browns of Major League Baseball between 1933 and 1938.

He broke into professional baseball in 1931, pitching for the Waterloo Hawks and going 8–13 with a 5.03 ERA.

He earned a call up to the big leagues, and on September 18 he made his debut.

His 4.14 strikeouts per nine innings were seventh best in the league that year, and the 20 home runs he gave up were the second most.

On April 12, 1935, Tietje was scheduled to start the first Chicago White Sox versus Chicago Cubs game ever held at Wrigley Field; he would have faced Lon Warneke.

He began the 1936 season with the White Sox, but after posting a 27.00 ERA in two games with them he was traded to the Browns for Sugar Cain.

That season, he spent a large amount of time with the San Antonio Missions, going 14–7 with a 2.67 ERA.

Defensively, he recorded a .983 fielding percentage, committing only two errors in 117 total chances.