Hockey jersey alteration

I have been asked by Mr. Hunter a couple of times to alter his jerseys, but kept putting it off as I was scared I would destroy them in the process of trying to fix them. I have never altered a jersey before. The other day I finally stopped avoiding, got out my seam ripper and just went to it. I thank the heavens, was successful. That means however that I have now been nominated to fix several more. Boo. 
Here it is before alterations. As you can see, the body is wide, but the arms are narrow - too narrow for Mr. Hunter when playing goal to stretch out and make all his saves in net. 

 So I cut out a 13 1/2 in square out of jersey material, then folded it in half and cut the inside v with curves to follow the jersey. Attached to seam ripped opening and sewed my little pink heart out.

 Tadah! Here it is all done. It looks ridiculous without his gear on, but he was happy with it. Too bad we did not have any of the matching blue, perhaps the white will blind his opponents? 

Cheers,
Carolyn