Tim Patten (born 1952) is a former roller derby athlete and self-published author under the pen name D.M. Bordner.
In 1973, Patten moved from Wisconsin to San Francisco. He studied computer science in college and has worked off and on in the computer industry ever since.
Patten skated for various professional roller derby leagues from 1973 to 1992. In 1988 he became owner of the San Francisco Bay Bombers team. He later formed his own league, the San Francisco-based American Roller Derby League (ARDL), which has gone through several incarnations but generally focuses on promoting a team named the Bay City Bombers. The award-winning documentary film Jam, screening at film festivals and special events in 2006, followed Patten's attempts, from 1998 to 2004, to find success with his league. The documentary Jam also appeared on the SUNDANCE channel for 2.5 years on rotation.
For four years, while seeking treatment for an HIV-related neurological infection, the infection was healed through progressive medications, Patten wrote the novel Roller Babes: the Story of the Roller Derby Queen, which he self-published under his sister's name in 2005. She receives his royalties. The novel was described in an independent, Michigan-based publication as "a fictional yet historically accurate and personalized account of the national women's roller derby leagues in the 1950s". Film rights to the novel were sold to Kaliber Films in July 2006.
In 2014, Patten wrote the book, honoring Herbivour and MGTOW: Why I Cheat: Men, Marriage, and Cheating.