So how where the former Rams players able to sue

OK so if I have this correct. There is no actual game tape of the Rams walk through prior to Superbowl XXXVI. So the players of the Rams 2001 Superbowl team that were upset by this entered a law suit against the New England Patriots "without" any actual evidence that this tape actually exists.

Now obviously this occurred and Belicheck has admitted it but I still don't get how these Rams players were able to even get someone to defend them without any evidence.

Everyone please pay attention to the topic heading.

It is in past tense......LOL!

To sue in federal court, all you need is $350 for the filing fee and have the ability to draft (or hire someone to draft) a legal document called a complaint.

That part is really not hard. 

The tricky part is convincing a judge not to dismiss a case when you don't any evidence that your claims have merit.

The lawyers for the Rams players found themselves in this predicament and decided to drop the case. 

The better question is why did their lawyers decided to pursue this in the first place.  Hopefully, at the very least, their lawyer's reputation was harmed by this foolishness.  Ideally, the LA bar committee should investigate and take them to task for bringing a frivilous suit.