THIS is How you EDIT ALL PLAYER Names in Teambuilder..
Simple video that shows every step of the way starting here on the EA website and ending as a downloaded team on your console (where you actually edit all the names).
Forum Discussion
@vanillakream Double check to make sure the same guys are rated how they are supposed to be though. On one of my teams, the ratings changed from play now to dynasty. I had an 82 TE drop to a 57 overall
@Mareec3 I've only done a test team so far, haven't made a legit team and got into it yet but I'll keep an eye out. Thanks for the heads up.
