The next season, the Senators became the Texas Rangers, and Thomas made his major league debut in 1974 for that team.

After two seasons in Texas, he was traded along with Ron Pruitt from the Rangers to the Cleveland Indians for John Ellis at the Winter Meetings on December 9, 1975.

[3] He split the 1977 season between the Mariners and the New York Yankees to end his major league career.

He was dealt along with cash from the Yankees to the Chicago White Sox for Jim Spencer and Tommy Cruz on December 12, 1977.

The transaction also included an exchange of minor-league right‐handed pitcher, with Ed Ricks going to the White Sox and Bob Polinsky to the Yankees.