Jeff Passan (@JeffPassan) / X
MLB expands list of who can wear No. 21 to honor Roberto Clemente on Sept. 15 - ESPN
Why MLB teams are calling up prospects: Rookie day limit, expanded rosters leading to promotions
Yankees won't have jersey patch for Opening Day, but it's coming
THEN AND NOW: MLB Team Uniforms
Sources: MLB letting more players to wear No. 21 for Clemente Day
MLB debut players will have special patches on jerseys : NPR
Mariners to Play in MLB's Annual Civil Rights Game on Jackie Robinson Day, by Mariners PR
Official Seattle Mariners Website
MLB trade deadline 2023: Tracking all the trades on the final day
MLB fans convinced Draft 2023 was 'rigged' after spotting huge giveaway on live ESPN TV coverage