<P> There have been some defiances of the dress code, however . Most notable incident involved pitcher Goose Gossage, who had a horseshoe mustache in deliberate defiance of George Steinbrenner . Jackson, though he currently sports only a mustache as a "special assistant" with the organization, did have a full beard during parts of his stay with the Yankees . Don Mattingly, the face of the franchise for the 1980s and the first half the 1990s, was briefly benched in 1991 for letting his hair grow too long and the team did not let him play until it was cut, but was eventually reinserted into the lineup after it became apparent that he was not going to cut it . </P> <P> Several players, including Clemens, Giambi, Sheffield, Johnson, Damon, Andrew Miller, David Wells, and Joba Chamberlain, grew significant facial hair after their departures from the organization . Journeyman outfielder Darnell McDonald had long dreadlocks throughout his career and had to cut them when joining the Yankees despite only being on their roster for three days when the Yankees released him . </P> <P> The Yankees are so well known with their dress code that players for other teams have been rumored to be signing for the Yankees if they adopt a clean - cut look before actually signing with them . In December 2012, San Francisco Giants pitcher Tim Lincecum, known for his long locks, cut his hair short . Although his hair was also short during his rookie season with the Giants in 2007, one Twitter commenter joked that he may have been preparing to play for the Yankees in 2014, since he was entering a contract year with the Giants in 2013 . Other players have refused to sign with the team due to these restrictions, such as Lincecum's teammate Brian Wilson, who said he would never shave his trademark beard to sign with the Yankees . </P>

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