Graves was mentioned in the Journal of Justice: Issue 29, where he reportedly escaped from a secret prison owned by CEO Dr. Priggs, who is later seen held at gunpoint in Graves' teaser.
Graves' ex-partner, Twisted Fate, sold Graves out to Dr. Priggs in exchange for entry into the experiment that gave Twisted Fate the ability to use magic.
Graves named his shotgun "Destiny", which is the name of Twisted Fate's ultimate, Destiny.
Graves' jokes are related to gallows humor, or humor that involve being funny in the face of, and in response to, a perfectly hopeless situation.
Graves' dance references from the cowboy dance during a country show. A direct side-by-side comparison can be seen here.
Graves is the last champion before Varus to have a League judgement.
When Graves is about to crit, his weapon has extra recoil making his gun shoot up into the air out of his left hand.
The poncho Graves wears in his classic version is likely a reference to the "Man with no name"; an iconic movie hero appearing in a trilogy of classic spaghetti westerns ("The Good, the Bad and the Ugly" being the most notable). Also, Graves' quote "Feelin' lucky?" is probably a homage to Clint Eastwood, the actor who portrayed the aforementioned hero. The line "Do you feel lucky, punk? Well do ya?" is Clint Eastwood's most famous line.
Graves' quote "I ain't got time to bleed." is a direct reference to the movie Predator .
Graves' quote "Dead man walkin." is a reference to the prison slang used for a prisoner's last walk to the execution chamber. It could also be a reference to WWE superstar the Undertaker's catch phrase.
In Polish client, after using SmokescreenSmokescreen, he say "Ciemność widzę" (I see darkness), which is reference to "Seksmisja" from 1983. Also his joke "Zawsze sikasz przez zapięty rozporek?" (You always pee with slit closed?) is from movie Kiler. Interesting thing is both quotes are said by Jerzy Stuhr.
Also his quote "W imię zasad" (In the name of the rules) and "Co Ty wiesz o zabijaniu?" (What do you know about killing people?) is a reference to Franz Maurer from the movie Psy from 1992. Both quotes are known to be said by Bogusław Linda.