Yairo Muñoz[a] (Spanish: [ɟʝajˈɾo]; born January 23, 1995) is a Dominican professional baseball infielder and outfielder for the Conspiradores de Querétaro of the Mexican League.

He has previously played in Major League Baseball (MLB) for the St. Louis Cardinals, Boston Red Sox, and Philadelphia Phillies.

While playing for the Vermont Lake Monsters of the Low–A New York-Penn League in 2014, Muñoz batted .298 with five home runs, 20 RBIs, and 14 stolen bases in 66 games.

After the 2016 season, he played for the Mesa Solar Sox of the Arizona Fall League and the Athletics added him to their 40-man roster to protect him from becoming eligible in the Rule 5 draft.

[3] He spent 2017 with both Midland and the Nashville Sounds of the Triple–A Pacific Coast League (PCL), batting a combined .300 with 13 home runs, 68 RBIs, and 22 stolen bases in 112 games between both teams.

[5] On December 14, 2017, the Athletics traded Muñoz and Max Schrock to the St. Louis Cardinals in exchange for Stephen Piscotty.

His first career walk-off home run came with two outs in the bottom of the ninth inning on May 31 at Busch Stadium against the Pittsburgh Pirates, a three-run shot off Felipe Vázquez to give the Cardinals a 10–8 win.

[12] He finished his 2018 rookie campaign batting .276 with eight home runs and 42 RBIs in 108 games, spending time at six different positions.

[14] On March 24, 2020, Muñoz was signed to a minor league contract by the Boston Red Sox;[15] he was subsequently a non-roster invitee to spring training.

[27] On June 14, 2022, Muñoz was called up from the Triple-A Lehigh Valley IronPigs to play with the Phillies against the Miami Marlins.