UFC 104: Machida vs. Shogun was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on October 24, 2009 in Los Angeles, California.
As with UFC 103, the UFC announced a portion of the preliminary card would air live and commercial-free during an hour-long block on Spike.
Chase Gormley, who was slated to face Ben Rothwell, instead faced Stefan Struve after Rothwell's opponent was changed to Cain Velasquez. An injured Sean Sherk was replaced by Josh Neer against Gleison Tibau.
Additionally, on the day of the weigh-out, two fights were changed to catchweight status as Anthony Johnson, Josh Neer and Gleison Tibau all came in over the weight limit of their respective weight classes.