Year 504 (DIV) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Nicomachus without colleague (or, less frequently, year 1257 Ab urbe condita). The denomination 504 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Joseph James "Joe" Rogan (born August 11, 1967) is an American martial artist, stand-up comedian, actor, writer and color commentator. He is best known for playing Joe Garrelli on the NBC sitcom NewsRadio, commentating for the Ultimate Fighting Championship, hosting the NBC reality show Fear Factor and The Joe Rogan Experience podcast.

Rogan was born in Newark, New Jersey. His paternal grandfather was Irish and the remainder of his ancestry is Italian.

In 1981, at age fourteen, he became a practitioner of Kenpo Karate before transitioning to Taekwondo. He eventually gained a 2nd dan black belt. A four-time state champion in Massachusetts, in 1987 he was the USA Taekwondo U.S. Open Champion. In 1996, he began training in Brazilian Jiu-Jitsu under Jean Jacques Machado, eventually earning his brown belt. In addition, he holds a brown belt in 10th Planet Jiu-Jitsu under Eddie Bravo.

He also practiced and competed in kickboxing.

In 1994, he co-starred on the Fox comedy Hardball as Frank Valente, the young, ego-centric star player on a fictional professional baseball team. From 1995 to 1999, he co-starred on the comedy NewsRadio. He portrayed Joe Garrelli, the electrician at WNYX, a news radio station in New York City. In 2002, he appeared on the episode "A Beautiful Mind" of Just Shoot Me as Chris, Maya Gallo's boyfriend. In 2011, Rogan played his first major character in a movie in the Kevin James movie Zookeeper. He is slated to play himself in an upcoming action-comedy starring Kevin James called Here Comes the Boom, set to be released in the summer of 2012.

Stephen Maxwell, better known as Steve Maxwell (December 3, 1952 - ), is an American fitness coach, physical educator, and Brazilian Jiu-Jitsu instructor. Maxwell was named one of the top 100 trainers in the USA by Men's Journal.

Maxwell was the first man to teach kettlebell classes in the United States. He holds a Master’s Degree in Exercise Science from West Chester University of Pennsylvania.

Maxwell trains professional athletes including players for the Phillies, Dodgers, and Eagles. He also has worked with various US Government agencies, including the DEA, Secret Service, and FBI as well as many Brazilian Jiu-Jitsu academies throughout the country. Maxwell travels around the world leading seminars in strength conditioning, Brazilian Jiu-Jitsu, kettlebells, and joint mobility.

Maxwell had owned and operated Maxercise Gym, in Philadelphia, PA for 16 years.

Maxwell has a long history of competitive grappling. He wrestled competitively through high school and college, and then in the US Army. Maxwell became the first person certified to teach Gracie Jiu-Jitsu in the USA, but is not the first American to earn a black belt from Relson Gracie.