Vobora remained on the Rams' practice squad until November 4, when he was promoted to the active roster after wide receivers Drew Bennett and Dante Hall were placed on injured reserve. On November 30, Vobora made his first career start at linebacker in the game against the Miami Dolphins. This was the first time a Mr. Irrelevant started in a game during his rookie season in 14 years, not since Marty Moore started four games for the New England Patriots in 1994. Vobora compiled five total tackles in the game, which tied for the second-best effort in team tackles, but the Rams lost 16–12. Vobora was named the starting strongside linebacker for the 2009 season. On September 30, 2009, he was suspended for four games for violating the NFL's performance-enhancing substance policy. Vobora stated that he would sue the company that produced the supplement he took, because it contained substances that were not listed on the label. Vobora's agent, Marc Lillibridge, conceded "(The supplement) was not on the list of officially sanctioned products, and ultimately a player is responsible for anything he puts in his body." On June 20, 2011, Vobora's lawyer announced that a federal judge ruled against the company and awarded Vobora $5.4 million. The Rams released Vobora on August 12, 2011. Vobora signed with the Seattle Seahawks on August 22, 2011, but was waived two weeks later on September 4. He re-signed with Seattle on October 4. Upon retiring from the NFL in 2012, David opened Performance Vault Inc. in Dallas, TX, a sports performance training center for elite athletes and U.S. Special Forces. In September 2014, Vobora founded the Adaptive Training Foundation. ATF is a 501(c)3 non-profit with a mission "to empower the human athlete, restore hope through movement, and redefine the limits of individuals with disabilities." ATF provides free personalized physical training programs for injured veterans and people living with disabilities. Participants in this nine-week program receive a training regimen that is customized for their fitness goals and specific disabilities. As a professional speaker, David now speaks to audiences across the country about seeing beyond the daily grind, moving past mediocrity, and tapping into deeper potential.