Wikipedia:Articles for deletion/UFC 9
Per , which has been used as justification to keep other UFC articles and would seem to be as valid here.  Also, there's at least one  talking about the show after the fact, on http://sports.yahoo.com/mma/news?slug=ki-ufcnine041209 Yahoo, which does also go into the significance of the event
— User:CaSJer, 17:39, 19 July 2012 (UTC)
Stance: keep
Cited policy: WP:SPORTSEVENT||WP:RS (Wikipedia:Notability)