Thomas attended Colleyville Heritage High School in Colleyville, Texas. In football, he passed for 3,057 yards with 32 touchdowns as a junior and 4,154 yards with 51 touchdowns as a senior. Thomas was rated as a four-star recruit and was ranked among the top quarterbacks in his class. He committed to the University of Oklahoma to play college football. Thomas was drafted by the New York Yankees in the 30th round of the 2013 Major League Baseball Draft but did not sign.
College career
Football
Thomas was redshirted his first year at Oklahoma in 2013. As a redshirt freshman in 2014, he appeared in seven games and made three starts. He completed 30-of-66 passes for 342 yards with two touchdowns and four interceptions. Thomas competed with Baker Mayfield and Trevor Knight for the starting job in 2015. Mayfield won the job with Thomas appearing in three games as a backup. In January 2016, he left football to focus on his baseball career.
Baseball
Thomas appeared in 14 games as freshman in 2014, recording one hit in 12 at-bats. He did not play in 2015 while focusing on football. He returned to baseball in 2016, appearing in 40 games. He hit.299/.354/.556 with six home runs and 27 runs batted in over 117 at-bats.
Professional career
Thomas was selected by the Los Angeles Dodgers in the 13th round of the 2016 MLB Draft. He signed with the Dodgers and made his professional debut with the Arizona League Dodgers. After seven games he was promoted to the Ogden Raptors. Thomas was awarded the Joe Bauman Home Run Award for finishing the 2016 season with 19 home runs among short season A and rookie ball players. On August 3, 2017 Thomas set Great Lake Loons' single-game records in homers, RBIs and total bases. In the same game, both Cody & teammate Carlos Rincon also hit back to back HR's twice in the same inning which has only been done one other time in the history of professional baseball. With the Rancho Cucamonga Quakes in 2018 he was named to the post-season California League All-Star team. In 127 games he hit.285 with 19 homers and 87 RBI. In 2019, he began the season with the Tulsa Drillers and was selected to the mid-season Texas League All-Star Game.
