Cheng, a native of Pingtung County, Taiwan, signed with the Pittsburgh Pirates out of Pu-Men High School as an international free agent on July 2, 2019, for a signing bonus of $380,000.[1][2] He did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[3]
Cheng spent the 2022 Minor League Baseball season with the Bradenton Marauders, playing shortstop more frequently.[5] He appeared in 104 games, hit for a .270 batting average, .376 on-base percentage, and a .794 on-base plus slugging percentage, while scoring 79 runs. Of his 38 extra-base hits, seven were triples. He led the Florida State League in triples and runs scored, finished second in on-base percentage, fourth in batting average, and fifth in on-base plus slugging percentage. Cheng's 33 stolen bases in 39 attempts led all minor leaguers within the Pirates organization.[5][7] At the end of the 2022 minor league season, Cheng was assigned to the Gigantes de Carolina of the Puerto Rican Professional Baseball League.[8]
At the start of the 2023 regular season, Cheng ranked thirtieth on MLB Pipeline's list of top Pirates prospects[9] and was assigned to the Greensboro Grasshoppers.[10][11] On June 23, he played his first game at the Double–A level, with the Altoona Curve.[12] During the season, Cheng set a career high in triples and was ranked by MLB Pipeline as the twenty-second best Pirates prospect.[13]
On November 14, 2023, the Pirates added Cheng to their 40-man roster to protect him from the Rule 5 draft.[14][15] Prior to the start of the 2024 season, he was ranked the seventeenth-best Pirates prospect by MLB Pipeline.[16] Cheng was optioned to Double–A Altoona to begin the year.[17]
^Destin, Andrew (August 28, 2023). "Pirates Pipeline: Shortstop Tsung-Che Cheng utilizing speed in breakout campaign". Pittsburgh Post Gazette. Retrieved November 5, 2023. The 22-year-old switch-hitting shortstop from Pingtung County, Taiwan, whom the team signed as an international free agent in 2019, first showcased his sensational speed with the Pirates when he swiped 16 bags in just 38 Florida Complex League games in 2021. But it isn't just the ability to steal bases that's allowed Cheng to rise to No. 22 overall in the Pirates' system, per MLB Pipeline. Facing some of the stiffest competition yet of his career in High-A Greensboro and Double-A Altoona, Cheng has run into some power to complement his usually high batting average, hitting 11 home runs so far in 2023. But even when Cheng isn't depositing balls over the fence, he's driving them and getting off to the races, as evidenced by his career-high 10 triples this season.
^Mackey, Jason (January 15, 2024). "As international signing day kicks off, Pirates secure two of Baseball America's top 32 options". Pittsburgh Post Gazette. Retrieved February 4, 2024. If you look at the Pirates' top 30 prospects list, it's littered with recent international additions. Nine of those guys comprise MLB Pipeline's current ranking of Pirates prospects, highlighted by right-hander Jun-Seok Shim at No. 14. Shim, signed a year ago, was the 10th-ranked prospect when he was selected. He's followed by shortstop Yordany De Los Santos, who was 12th in the 2022 class and received a bonus of $1.2 million. After Tsung-Che Cheng (No. 17), who was added to the 40-man roster this offseason, there's outfielder Shalin Polanco at No. 21. The Pirates signed Polanco (no relation to Gregory) for $2.35 million in the 2021-22 period, the second-biggest bonus in franchise history for an international player.
^Yen, William (8 March 2023). "Taiwan outplayed 12-5 by Panama in World Baseball Classic first game". Central News Agency. Retrieved 13 March 2023. However, Panama surged again with another six runs in the top of the six frame to bring the score to 11-1 before Taiwan secured its second run in the bottom of the sixth inning when second baseman Cheng Tsung-che (鄭宗哲) singled on a sharp line drive for Kungkuan Giljegiljaw to score.
^Yen, William (10 March 2023). "WBC/Taiwan wins thriller against Italy at World Baseball Classic". Central News Agency. Retrieved 13 March 2023. Taiwan tied the game in the bottom of the second inning when second baseman Cheng Tsung-che (鄭宗哲) singled on a ground ball to the right field for teammate Chen Chieh-hsien (陳傑憲) to make it 2-2.
^Yen, William (12 March 2023). "Yu Chang grand slam gives Taiwan chance to advance in WBC". Central News Agency. Retrieved 13 March 2023. Taiwan responded in the bottom of the inning on a Chiang Kun-yu sacrifice fly that scored catcher Kungkuan Giljegiljaw and a gorgeous drag bunt base hit down the first-base line by Cheng Tsung-che (鄭宗哲) that sent Chen Chieh-hsien (鄭宗哲) home to put Taiwan ahead 7-2.
^"CHENG Tsung-Che". World Baseball Softball Confederation Asia. Retrieved 4 February 2024.