Available on a free? European clubs don't know how much they can rob and get away with it here. 

Does he sign a contract just so mariners can get a fee? 

Nah, he would run the risk of limiting offers on the table. Mariners should have had an auto extend clause in his contract, so it's really on them. If we had a proper domestic transfer system, those sorts of clauses would be the norm. 

He should try a more technical league in Europe or Japan.

I think he's ready to go over. 

la liga is the only league with shorter players i can find!

Japan would suit very much.