According to Babaganoosh, Urgot was unavailable for the Ionia versus Noxus Grudge Match due to being damaged and needing considerable time to be repaired. He received a major strength buff in the following patch release.
Professor Stanwick Pididly's quote at the end of Urgot's background info is a reference to Šablóna:W.
Urgot's Crabgot skin is a reference to the Giant Enemy Crab in Genji: Days of the Blade, which became a popular internet meme.
Urgot's Crabgot Splash Art is likely a reference to Šablóna:W, a classic 1954 monster horror film.
In Šablóna:Csi Art Spotlight, around 2:50, a tab saying Urgot Mech can be seen in the top left.
This was likely the development name for Battlecast Urgot.
Šablóna:Ci sword is visible in the background of Urgot's Battlecast skin. In addition, the banner of Demacia lies torn beneath one of his legs, as does the helmet worn by the champion shown in the images of some summoner spells.
When Urgot was still a Noxian field soldier, his commanding officer was Šablóna:Ci.
When Urgot became the High Executioner of Noxus, he was attached to Šablóna:Ci military division.
Before Urgot could execute the captured Šablóna:Ci, the Dauntless Vanguard and their leader Šablóna:Ci interfered at the final moment. Urgot was cut in two by the zealous warrior as he scrambled to free the Demacian Prince.
Professor Stanwick Pididly, using research notes stolen from Šablóna:Ci, reconstructed Urgot into a cyborg body of his own design. The experiment was a success largely due to Urgot's sheer thirst for vengeance against Garen, whom he entered the League to kill.