According to the Yankees' website, Mark Teixeira is 6'3"
Hopefully not
A lot of the Yankees are good, however some of better players include Derek Jeter, A-Rod, Nick Swisher, and Mark Teixiera.
Mark Kelly is not tall
Mark Harmon is 6ft tall.
Mark Ozog is 6'.
Mark Capone is 6'.
Mark Gilvary is 6'.
Mark Mahon is 6'.
Mark Corden is 6'.
Mark Kratzer is 6'.
Mark Landis is 6'.
Mark Letto is 6'.