Main Page | See live article | Alphabetical index Jack O'Neill is a fictional character in the science fictiontelevision show Stargate SG-1 played by Richard Dean Anderson. Jack O'Neill may also refer to the founder of O'Neill, a company that manufactures wetsuits. Jack O'Neill was also a member of the acoustic rock band Jackopierce. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.