<Li> No glass buttons or polished metal . </Li> <Li> No commercial advertisements on uniforms . This rule is at variance with many other professional sports . In North America, corporate sponsors' logos are ubiquitous on vehicles and uniforms in motorsports (such as NASCAR, IndyCar, and the NHRA). Outside of motorsports, sponsor logos are increasingly common in leagues such as the Arena Football League, WNBA, and soccer leagues such as MLS and WPS . Corporate logos on uniforms are even more widespread outside North America, most notably in soccer . The commemorative patches worn by the New York Mets during their inaugural season at the Citigroup sponsored Citi Field did not feature the name of the ballpark in adherence to this rule . However, when the New York Yankees and Tampa Bay Devil Rays opened the season in Japan in 2004, an ad for Ricoh was clearly visible on the batters' helmets . When the Oakland Athletics and Boston Red Sox opened the 2008 season in Tokyo, not only did both teams wear batting helmets featuring the Ricoh ad; but also, the Red Sox featured a commercial advertisement for a New England - based business on their jerseys and the A's jerseys featured an advertisement for Pepsi . Exceptions are made for the manufacturers of the pieces of uniform or equipment upon which they are placed (i.e. the hat manufacturer's emblem may be on the hat). </Li> <Li> Names: "A league may provide that the uniforms of its member teams include the names of its players on their backs . Any name other than the last name of the player must be approved by the League President . If adopted, all uniforms for a team must have the names of its players ." Again, with the elimination of separate administrations for the American and National leagues, this rule is more often invoked by the minor leagues . (Ichiro Suzuki, when he played for the Seattle Mariners and currently playing for the Miami Marlins, is the last player to have his given name rather than his family name displayed on the back of his uniform, having applied for this permission in order to continue being identified as he had been in the Japanese leagues . Vida Blue also used his first name on the back of his uniform when he played for the San Francisco Giants in the mid-1980s). As of 2010, the New York Yankees, Boston Red Sox and San Francisco Giants do not display their players' names on their home uniforms (the Giants did adopt the names in the 1970s, but removed them from the home uniform in 2000); the Yankees also do not display them on their road uniforms . The New York Mets used alternate home uniforms without last names for the 1999 season . The names were returned the next season . The Chicago Cubs did not have names on their home or alternate jerseys for the 2005 and 2006 seasons . The names are now back on both jerseys . The Los Angeles Dodgers did not have names on the back of their home and road jerseys for the 2005 and 2006 seasons . Names returned on both jerseys in 2007 . The Minnesota Twins did not feature names on the back of three different "throwback" alternate uniforms, used in 2009, 2010 and 2011 . </Li> <P> Another apparent violation of the concept of a "uniform" is that some players on a team will wear the traditional knee - breeches or "knickers" while other teammates are wearing the more - recent ankle - length, closely cut trousers . Many clubs do this at both major and minor league level, with no apparent objections . </P>

Are the yankees the only team without names