I apologize if this has already been covered. Chalk this up to something completely annoying:
The White Sox, as of yet, do not have a sleeve sponsorship. For years on their road grey jerseys and their alternate black jerseys, the diamond-sock logo has been on the right sleeve of the jersey (as you're looking at it), or on the players' left sleeve. (Sidebar- about 12 years ago, they replaced the diamond sock on the road greys with the old English SOX logo).
So, just noticed that on the alternate blacks that they've moved the sleeve logo diamond sock to the left sleeve of the jersey (right sleeve for the player) if they bat right handed so that the other sleeve is more visible to the CF camera when they're batting. This is obviously setting the jerseys up for eventual sponsor logo.
For someone who's watched thousands of games, the change is glaring.