You could certainly play in the league if you were eligible because they are play-money games and USians are allowed to play in those.
Not sure about the freerolls though since I think PS (and others) allow access to real-money games based on your IP address. You might be better off asking the question at the PS help page.
BluffMeAllIn
4evrInmyheart RIP xoxo :(
Silver Level
Joined
May 2, 2009
Total posts
11,324
Awards
1
Poker Chips
3
Casino Coins
0
#3
You will be able to play in playmoney games only, so no freerolls that award $$ or buyin games.