What is the name of the sweaters Zac Efron/Troy Bolton wears in High School Musical?

In the high school musical movies, Zac Efron often wears this sweaters which have colored arms and neck, and the rest is white. I don´t exactly know how to explain it, but he wears it on this picture here:
http://weheartit.com/entry/49255823/via/4310hearts

I wonder what this kind of sweater is named, i´ve red it some place earlier but I cant remember, and I have to know what it´s named to search it up.

The sweater looks more like a baseball practice jersey. I found one that looks just like the one Zac Efron is wearing here:

http://www.modells.com/product/rawlings_adult_coolflo_3-4_sleeve_baseball_jersey_scarlet-cfs-scarlet.do?sortby=bestSellersAscend&from=fn

They are also available in many other colors! Hope I helped!! :)