Revelation Theory EP is the first EP by Rev Theory, who were at the time known as Revelation Theory, released in 2004 independently.
 The songs have a rougher sound, as this was likely a demo.
Mammal is the self-titled debut Extended play (EP), by Australian hard rock band, Mammal from 2006.
 The band sold the EP independently at their live shows and on their website until early 2007 when they signed with Metropolitan Groove Merchants (MGM) to distribute it independently.
 The original version (no longer in print) was replaced by the MGM version, released in March.
 The EP peaked into the top 20 of the AIR Charts.
Rock & Roll Hall of Fame Covers EP is EP compilation by American rock band Red Hot Chili Peppers, released in 2012 through iTunes as a digital-only download.
 The band first announced the EP through their website on April 19, 2012 with the title "We Salute You", although it was changed on the date of the release.
 The EP consists of six cover songs, live and in the studio, of previous Rock and Roll Hall of Fame inductees all who influenced the band.
 The EP was released to commemorate the band's own induction into the Rock and Roll Hall of Fame in 2012.
 All six songs have been previously featured on other releases by the band.
 Four of the six tracks had never been released digitally before.
Black Lodge is an industrial rock band originating from Los Angeles which was formed in 2012 by guitarist Johnny Royal.
 The band recorded their debut self-titled EP with Jeordie White, Johnny K, Lee Miles, and Sean Beavan.
 The band released the EP independently on 22 October.
The Transition EP is the follow-up to Christian rock band Philmont's full-length "Attention", and their first release since parting ways with Forefront Records.
 Philmont released the EP independently on October 19, 2010.
 It is available via digital outlets such as iTunes, at Philmont concerts, and through Philmont's online merchandise store.
Sparks the Rescue is an American rock band from Maine.
 They formed when members of three high school bands Pozer, Short of April and Two Girls Later converged.
 Their debut EP "Stumbling Skyward" was released independently in 2005 with McAllister and O'Connell sharing main vocal duties.
 The band released the "Hey, Mr. Allure" EP in 2006, which saw the addition of lead vocalist Alex Roy.
 On February 6, 2007, Sparks the Rescue released their junior EP "The Secrets We Can't Keep" after signing to Double Blind Music.
 This release saw the departure of their keyboardist.
 STR officially released their debut full-length album Eyes to the Sun on May 5, 2009 on Fearless Records (the album was previously released October 7, 2008 on Double Blind Music).
 The album was produced by Jonathan Wyman of Halo Studios in Westbrook, Maine.
Rev Theory (formerly known as Revelation Theory) is an American rock band formed in 2002 in North Andover, Massachusetts.
 The band has released four studio albums: "Truth Is Currency" (2005), "Light It Up" (2008), "Justice" (2011) and "The Revelation" (2016), as well as three EPs: "Revelation Theory EP" (2004), "Acoustic Live from the Gibson Lounge" (2009) and "Take 'Em Out" (2012).
 The song "Hell Yeah" was the opening theme song for the popular Spike show "Blue Mountain State" and the song "We Own The Night" was the main theme song for the WWE Network reality series "Breaking Ground".
 The song "Voices" is currently being used by World Wrestling Entertainment (WWE) wrestler Randy Orton.
Everyday Sunday was an American Christian rock band from Columbus, Ohio with the founding member Trey Pearson as lead singer.
 The band released two albums on Flicker Records including "Stand Up" and "Anthems for the Imperfect". "
Wake Up!
 Wake Up!
" was the debut album on Inpop released May 22, 2007 on Inpop Records, followed by "Best Night of Our Lives".
 The band released an EP independently in 2013 titled "A New Beginning EP".
 After break-up Pearson keeps the right to the name Everyday Sunday.
 The band scored five U.S. Christian number 1 singles and twenty Christian Top 10 hits.
3 Pill Morning (sometimes stylized as 3PM) is an American Rock / Hard Rock band from Minneapolis, formed in 2004.
 The band consists of Jeff Stebbins (vocals), Jon Stephenson (guitar), Ryan Lee (bass) and Tom DuPree III (drums).
 On October 1, 2008, the band released their debut album "The Side Effects of Chronic Ambition" independently.
 Their first radio single "Loser" spawned from their EP "Take Control" and stayed in rotation on the Top 100 chart on Active Radio in the US for over 6 months in 2011.
 On July 17, 2012, the band released their sophomore full-length studio album entitled "Black Tie Love Affair" on Page 2 Music distributed by eOne.
 The music video for "Skin" was officially released on July 5, 2012.
 The band's latest album "Never Look Back" was released on July 29, 2016 on Countdown Entertainment distributed by The Fuel Music.
 The album recognized as the Billboard #15 Hard Rock Albums and #14 Heatseekers Albums for that week.
Dovetail Joint was a rock band that formed in Chicago, Illinois in 1992.
 The band featured guitar/vocalist Charles Gladfelter, guitarist Robert Byrne, bassist Jon Kooker, and drummer Joe Dapier.
 After several years of playing locally, as well as independently releasing their self-titled album in 1995, the band started to garner interest after their song "Level on the Inside" was featured on an annual compilation disc of local radio station WKQX Q101.
 Columbia Records quickly signed the band and released "001" in early 1999.
 "Level" turned out to be the band's only commercial hit, and Columbia dropped the band before releasing a second album.
 However, an independently released EP was released in 2002 which would turn out to be their last.

Question: Which American rock band, formed in 2002, released an EP independently in 2004?
Answer: Rev Theory