I managed to get this only having to play a couple of matches.
- First I edited Messi, maxing out his attacking stats giving him a 102 overall. Also made him 15 so I could get the other Become a Legend player of the year achievements.
-Transfer him to Atletico Miniero and start a Become a Legend with an existing player.
-You may notice if you check the team game plan you maybe playing at Right Back. All you have to do is go to Player Menu,Preferred Position and make a request on all Forward positions and Attacking Midfielder. (After a few games and your manager trust level going up you should get moved to Attacking Midfield).
- I then simulated the whole season, you may have to play one or two anytime just to boost your records.
- I finished with 55 Appearances, 50 goals and 6 Assists.
- I was getting the achievement for winning the title at the same time so made sure to win the title. I am unsure if winning the title effects whether or not you can be Player of the Year but it can't hurt.