1. ** Tradition and simplicity * *: In many sports, including baseball, basketball and football, the tradition of the team is that only the players' numbers are printed on the jerseys, not their names. This may be due to the cultural and historical background of these movements. For example, baseball uniforms usually only have the players' surnames printed on the back, not on the chest. This tradition may represent a simple and simple aesthetics, or it may also represent a symbol of the team.

2. ** Visual effects and brand recognition * *: For some professional teams, they may prefer to let the audience remember their player numbers rather than their names. This helps to strengthen the team's visual image and brand recognition. For example, basketball fans may be more likely to remember Michael Jordan's No.23 jersey than his full name.

3. ** Identification within the team * *: In many cases, the players and staff of the team may prefer to identify their teammates and opponents by numbers rather than by names. This may help them communicate and cooperate more efficiently during the competition.

4. ** fan culture * *: many fans may buy jerseys with their favorite player numbers printed on them, not just the players' names. This shows their love and support for the players.

5. ** Sponsor requirements * *: In some cases, sponsors may require teams to print their trademarks or slogans on jerseys instead of the players' names. This helps to improve the brand exposure and popularity of sponsors.

Generally speaking, there are no players' names but only numbers on the jerseys, which may be due to various reasons such as tradition, visual effects, team recognition, fan culture and sponsor requirements.