Are you looking for American Football clubs or Soccer? if soccer then there are several clubs you can train at like @champions fooball academy and @Al Ahli Club Jordan ..if American Football, I don't think we have that in Amman yet, but the
@British Club in Abdoun hosts touch Rugby friendly matches every Sunday, you just need an invitation from someone from the inside.. and on saturdays there are always official rugby games happening in @petra university I believe the teams are called Citadel &Nomads & Aqaba Sharks.