<Li> Replacements: After the roster is selected, the All - Star manager and the Commissioner's Office will replace players who are injured, decline to participate, and pitchers who started on the Sunday before the game . </Li> <P> Since the first game, American League players have worn their respective team uniforms rather than wearing uniforms made specifically for the game, while National League players waited until the second game to do this . In the first game, the National League All - Star Team wore gray uniforms with navy blue letters spelling "NATIONAL LEAGUE" across the front of the jersey with "NL" caps . </P> <P> During the games of the 1970s and 1980s, alternate jerseys were commonly worn by players from the Oakland Athletics, Baltimore Orioles, Cleveland Indians and Chicago White Sox . When the late 1980s and early 1990s approached, fewer alternates were worn for the games . They were back in use for the 1992 game by White Sox pitcher Jack McDowell and infielder Robin Ventura, and for the final time in the 1997 game by Seattle Mariners outfielder Ken Griffey Jr. & by San Diego Padres 3rd baseman Ken Caminiti . Under current MLB rules, alternate jerseys are no longer allowed to be worn during the game, as players must wear either their team's white or gray uniforms, depending on which league is the home team . </P> <P> Game - specific uniforms are made every year, but are not worn for the game itself . Instead they are worn during batting practice and the Home Run Derby . </P>

How does mlb pick home run derby participants selected