Captain O'Neal is a level 65 PvP Jewelcrafting designs vendor located in the Champions' Hall in the human city of Stormwind.
Given his proximity to Lieutenant Karter, Lieutenant Jackspring, and Sergeant Major Clate along with his physical appearance, he is almost certainly a reference to Jack O'Neill. Jack O'Neill was the long-time main character of the popular Sci-Fi series Stargate SG-1, in which O'Neill worked with Samantha Carter (Karter), Daniel Jackson (Jackspring), and Teal'c (Clate being an anagram of Teal'c) to defend the Earth. Also nearby is Guard Hammon, this could possibly be a reference to General Hammond, also in Stargate.
Prior to release of World of Warcraft: Wrath of the Lich King Captain O'Neal was given the title of <Weapons Quartermaster>
He is no longer in game
- Patch 1.4.0 (2005-05-05): Added.