![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://about.underarmour.com/en/stories/2022/08/under-armour-brings-together-the-next-generation-of-basketball-s/_jcr_content/_cq_featuredimage.uaimg.jpg)
Under Armour Brings Together the Next Generation of Basketball
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://img.mlbstatic.com/mlb-images/image/private/t_16x9/t_w1024/mlb/yvj8mged3amwlll4gnu1)
Roberto Clemente Day celebration around MLB
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://about.underarmour.com/content/ua/about/en/stories/2022/04/under-armour-celebrates-the-start-of-the-2022-mlb-season-/_jcr_content/root/container/image.coreimg.jpg)
Under Armour Celebrates the Start of the 2022 MLB Season
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://res.cloudinary.com/graham-media-group/image/upload/f_auto/q_auto/c_thumb,w_700/v1/media/gmg/GE6GP3Z63BFONH3ANOXWBDRPWQ.jpg?_a=ATAPphC0)
MLB
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://www.twincities.com/wp-content/uploads/2022/09/GettyImages-1243266378.jpg?w=640)
Puerto Rican Twins don No. 21 in tribute to Roberto Clemente
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://assets-varnish.triblive.com/2020/09/2991726_web1_GTR-BucsEarly01-090920.jpg)
Puerto Rican players follow Pirates' push to wear No. 21
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://townsquare.media/site/150/files/2022/10/attachment-GettyImages-1422071805.jpg)
Report: Carlos Correa Opting Out of Contract with Minnesota Twins
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://content.sportslogos.net/news/2020/09/roberto-clemente-pirates.jpg)
All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of
![Why are MLB players wearing 21? Tributes around the league for Pirates legend explained](https://res.cloudinary.com/graham-media-group/image/upload/f_auto/q_auto/c_scale,w_400/v1/media/gmg/RFOTLZJL35GALEYKV3GVAIRXW4?_a=AJFJtWIA)
Jackie_Robinson