BOSTON -- The Red Sox placed infielder Marcelo Mayer on the 10-day injured list with a bone stress reaction to the left ulna on Friday. To fill his spot, Boston recalled infielder Tsung-Che Cheng from Triple-A Worcester. Cheng will wear number 39.
Mayer, 23, has played in 70 games for Boston this season, making 39 starts at second base and 20 at shortstop. The left-handed hitter has batted .220 with 19 runs scored, 10 doubles, three home runs and 22 RBIs. Originally selected by the Red Sox in the first round (No. 4 overall) of the 2021 First-Year Player Draft, the California native has hit .223 in 114 career Major League games, all with Boston.
Cheng, 24, has batted .254 with 34 runs scored in 64 games for Worcester this season, making 37 starts at shortstop and 23 at second base. The left-handed hitter made his Major League debut in 2025 with the Pittsburgh Pirates, appearing in three games. A native of Taiwan, he was claimed by Boston off waivers from the Nationals on Feb. 6.