William Henry Demps Jr. (born November 7, 1979) is a former American football safety who was signed by the Baltimore Ravens as an undrafted free agent in 2002.

Demps was a walk-on who was a two-year starter at San Diego State University where he was also a member of Sigma Pi fraternity.

Demps started all 11 games at strong safety as a senior in 2001 and earned a second consecutive First-team All-Mountain West honors.

In 2003, Demps saw action in all 16 regular season games with nine starts for Ravens and recorded 59 total tackles, two interceptions and one forced fumble.

In 2004, Demps started all 16 games for the first time in his career, tying for sixth on the team (Gary Baxter) with 86 tackles, including 72 solo.

Demps started in all 11 games in which he played at free safety for Baltimore in 2005 before tearing his ACL and being placed on injured reserve on December 2, 2005.

Demps was also the owner of a Wet Willie's chain bar in San Diego, California, the first on the West Coast, which celebrated its Grand Opening on October 8, 2010, and featured dishes influenced by his mother's home cooking such as the Seoul tacos.

[4][5][6] Demps hired a muralist to paint the walls with San Diego landmark scenes including Unconditional Surrender that stands next to the USS Midway Museum.

Several of Demps's celebrity friends attended to show their support, including Shaun Phillips and Stephen Cooper of the San Diego Chargers, Carlos Emmons (formerly with the Steelers, Eagles and Giants) and Robert Griffith of the Minnesota Vikings.