The Milwaukee Brewers are wearing number 21 today as part of the Major League Baseball-wide celebration of Roberto Clemente Day on September 15-16, 2025. All MLB players, managers, coaches, and umpires are wearing a white "21" patch on the upper left chest to honor Roberto Clemente's legacy. Additionally, certain Brewers players, including the team's 2025 Roberto Clemente Award nominee Sal Frelick and others, wear the No. 21 on their uniforms as a tribute. Roberto Clemente, a Hall of Fame player and humanitarian, was known for wearing No. 21 throughout his entire career. MLB honors him by allowing players of Puerto Rican heritage, past Clemente Award recipients, and Clemente Award nominees to wear No. 21. This year, it is a league-wide tribute to celebrate his impact both on and off the field. The Brewers are honoring Sal Frelick, their Clemente Award nominee, before their game against the Los Angeles Angels, with multiple players wearing "21" and a commemorative patch as part of the celebration.