yes there is a way..ive done it already...im at school on my laptop and don't have the link to the hex line but when i get home i will be sure to get back with you on the he correct hex line to edit..
I just did mines now and it worked. I opened the save in HXD and replaced the "00019A90" line with 01, 99, 01, 99, etc. Then Rehash and Resign.
Noticed this year they cap out your abilities too. So you cannot be 99 in everything. The cap varies depending on your position and play style. I made a PG with All-Around Play style and my Offense Rebound was capped at 50. Now my player is 99 overall. But it means for a PG with All-Around Play style. But HOPEFULLY we will be presented with a way to mod that as well.