The list is based on sales of Majestic jerseys from MLB.com/shop since the end of the last World Series, and the top 10 features players from eight teams. Yankees shortstop Derek Jeter, entering the final season of his career, is the third-most popular jersey in baseball.
Two young franchise catchers -- Yadier Molina of the Cardinals and Buster Posey of the Giants -- are in the top 10, and so is Clayton Kershaw, the reigning National League Cy Young Award winner.
Seventeen of the top 20 players were All-Stars last season. Seven of the top 20 are infielders, five are pitchers, five are outfielders and two are catchers, with Ortiz the only designated hitter on the list.
Twelve of the league's top 20 most popular jerseys belong to players under 30 years old, and five -- those belonging to Manny Machado, Yasiel Puig, Bryce Harper, Mike Trout and Matt Harvey -- are for players 25 or younger. The Mets, Harvey's team, also have David Wright represented in the top 20.
Spencer Fordin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.