Mike Tyson did it best. No music, no shirt 
11er by Day - Mike Tyson did it best. No music, no shirtJust chains clanking together
Now that I'm looking around on YouTube, The Warrior's Code by Dropkick Murphys would be a good one, if no one's done it yet.
BJTT_Bromovich -spliff - Teenage Wasteland by Baba O'RileyVTFU
Vote up because I know what song you mean (and it's great), but otherwise down because you appear to not know the actual song title or WHO (or it's a joke to get some smartass to say that) sings it.
My top 3 choices would be
Cream - Crossroads
The Clash - Rudie Can't Fail
Dropkick Murphys - The Gauntlet
I would walk in to the theme song from Halloween.
You know the one. 
Bob Marley - Natural Mystic
Its like the calm before the storm
God's gonna cut you down. That Johnny Cash tune.
Kraygus -BJTT_Bromovich -spliff - Teenage Wasteland by Baba O'RileyVTFU
Vote up because I know what song you mean (and it's great), but otherwise down because you appear to not know the actual song title or WHO (or it's a joke to get some smartass to say that) sings it.
My top 3 choices would be
Cream - Crossroads
The Clash - Rudie Can't Fail
Dropkick Murphys - The Gauntlet
http://www.mixedmartialarts.com/thread/2360107/UFC-Teenage-Wasteland-Montage/
FETT_TFK_El Pescadero -UGCTT Jobe Watson's Original Butler -Right... Can't believe no one has yet!FETT_TFK_El Pescadero - "Saturday nights alright for fighting" by Sir Elton JohnThat's another good one that I'm still waiting for someone to walk out to.
VU
prefer the Flotsam and Jetsam cover
https://www.youtube.com/watch?v=nYcEO2x_p24
at least for a walk out song
Goddamn, Rooster is a badass walkout song.
Silence - Delerium Feat. Sarah McLachlan (W&W vs Jonas Stenberg Remix)
The climax of this song is a perfect way to get in the zone.
LetLebenBangBro - Chris Leben recently said in an interview that he always tried to come out to SLAYER's "Raining Blood" but the UFC wouldn't let him because it was too hardcore for the UFC. Fucking Pussies!!!Chuck did it once.
Josh Barnett walks out to Bolt thrower...
Tobed0g -LetLebenBangBro - Chris Leben recently said in an interview that he always tried to come out to SLAYER's "Raining Blood" but the UFC wouldn't let him because it was too hardcore for the UFC. Fucking Pussies!!!Chuck did it once.
Josh Barnett walks out to Bolt thrower...
Don't remember Chuck coming out to slayer.... and Josh said in an interview or podcast that the UFC asked him to use a different song but he told them to fuck off....
Sober by Tool. The intro is fucking awesome
LetLebenBangBro - Why aren't there any fighters coming out to really heavy ass shit like Slayer, Pantera , or Chimaira or some shit like that.. if it was me i'd be walking in to some Cattle Decapitation or Decapitated or some heavy ass shit..... all this pussy Jay Z DMX and Kanye bullshit.... at least come out to Rittz or some good rap music like Warren G RegulateYou don't know shit about hip hop.
"Rumble" by Link Wray. Nice and chill.
jaytrainwreck -LetLebenBangBro - Why aren't there any fighters coming out to really heavy ass shit like Slayer, Pantera , or Chimaira or some shit like that.. if it was me i'd be walking in to some Cattle Decapitation or Decapitated or some heavy ass shit..... all this pussy Jay Z DMX and Kanye bullshit.... at least come out to Rittz or some good rap music like Warren G RegulateYou don't know shit about hip hop.
U r correct sir... because i mostly like metal and don't give a fuck about hip hop. Tell me somin I don't know... and Rittz is the best rapper in the game.
Rittz- Like I Am
Rittz- Nowhere to Run
Slayer- Live Undead
Pantera- Slaughtered
Chimaira- Lend a Hand
Death- Scavenger of Human Sorrow