It would be nice if the game kept track of stats on a season by season basis for each player (maybe just for season, maybe for all).
For example:
On that page where the stats, age, height, and transfer history is shown, under the transfer history it could say...
Stats
Season Team Games Goals Assists Points+/- and so on..
32 Beach City Lightning 21 14 3 17 -4 // 37 23 8 31 +24
31 Random Ice Club 21 11 6 17 +2 // 28 11 9 20 +9
...
...
...
First column is league second is friendly/cups.