Conversation so far:
When did A.J. Styles return to the independent circuit?
On March 14, 2003, A.J. Styles returned to International Wrestling Cartel (IWC) and successfully challenged IWC Super Indy Champion Super Hentai for the title.
Did A.J. Styles leave the professional wrestling independent circuit again in 2005?
On October 21, 2005, A.J. Styles won the vacant IWA: Mid-South Heavyweight Championship in a four-way dance match. Two day later, Styles lost the title to CM Punk.
What is PWG
The PWG World Championship is a professional wrestling world championship in the Pro Wrestling Guerrilla (PWG) professional wrestling promotion.
What was a major event for A.J. Styles during his return to the independent professional wrestling circuit between 2003-2005?
On April 12, A.J. Styles debuted in Combat Zone Wrestling (CZW), competing at the promotions 3rd Best of the Best event.
Did A.J. Styles have a major rivalry with Rave during his return to the independant professional wrestling circuit between 2003-2005?
On September 3, A.J. Styles entered the 2005 Battle of Los Angeles tournament, but was defeated in the finals by Chris Bosh.
Who else did A.J. Styles partner with during his return to the independant professional wrestling circuit between 2003-2005?
Did A.J. Styles retire in 2005?
Allen Neal Jones is an American professional wrestler currently signed to WWE, where he performs on the Raw brand where he is the current WWE United States Champion.
Did A.J. Styles lose any matches during his return to the independant professional wrestling circuit between 2003-2005?
A.J. Styles defended the title until August 6 at Zombies Shouldn't Run, where he lost it to Kevin Steen.

Question: Which title did he retain?
Self-contained rewrite: Which title did A.J. Styles retain?