Riall began working in political campaigns in 2012 after he retired from a 9 year career as a professional football player. His first campaign was as a field organizer in Cincinnati, Ohio for President Obama's re-election campaign, which was also where he started his professional football career when he was drafted to the Bengals in the 6th round in 2001 out of Stanford University. Riall's focus in politics has always been on the field side of grassroots campaigns. He has knocked thousands doors for campaigns in six different states, organized the collection of over 1,000,000 signatures, and created grassroots volunteer programs that are still self-sustaining today.

Since 2016, Riall has been working in campaigns around the country, primarily in the state of Washington, where he has led impactful campaigns focused on gun violence prevention, police accountability, and criminal justice reform. After directing ballot initiative I-940, Riall founded Prism West (formerly Prism Washington) in 2018 to focus on getting progressive candidates of color in office to increase representation in government and bring real transformative policies to fruition. Many of his clients have broken many barriers by becoming the first of their demographics to be elected to their offices. Riall is currently heavily involved in ballot initiatives in California, such as the recent initiative for statewide Rent Control, and a higher minimum wages for hotel and hospital workers.