Ruiz captained Fulham to victory over C.S. Cartaginés in his native Costa Rica on Sunday.
Jol told fulhamfc.com: "Bryan wore number 11 last year because someone else had the number 10 but I think he is a typical number 10. He can play as a midfield player and he can play as a second striker. I have to say in one of our games at the end of last season he scored two goals and then I played him on the right and he played in Holland of course in a different system on the right. Bryan Ruiz is an offensive quality player who can play in three or four positions."