He celebrated victory over SF with scarf of Croatian soccer club. Said he will do the same if we win Superbowl. </P>

Diehlalso celebrated Superbowl victory with Croatian flag.</P>

He stated on several occasions that he is very proud of his Croatian heritage and is apparently very active in Croatian comunity in NYC.</P>

In that link there are also pictures of him when he visitied Hajduk's stadium this summer.</P>