Cool Base and Regular Jerseys

[Danny899]

I was watching the Yankees play the Mariners today when I noticed some of the Mariners in the field were wearing the Cool Base jerseys and others were not. You can always tell by the underarms and side panels as well as the closeups. Is this unusual for the players to wear different jersey types types for the same game? Also, are the Yankees the only team that don't wear a Cool Base jersey? Thanks everybody.

[BamaHater]

I think it is really up to the player if they want to wear cool base or not. Many teams are strictly cool base only however if a player want a regular jersey they can get one. As for regular jerseys the Yankess obviously wear them strictly and surprisingly the Blue Jays only use regular jerseys as well. These are the only two teams I know that wear strictly non cool base jerseys.