At 6 ft 6 in (1.98 m) and over 300 lb (136 kg), he was the tenth overall selection in the 1992 NFL draft, taken by the Seattle Seahawks.[2] After four seasons in Seattle, he finished his career with the Detroit Lions.
Following his playing career, Roberts returned to the Seattle area and was an assistant football coach at Interlake High School in Bellevue. He earned a master's degree in intercollegiate athletic leadership from the University of Washington in 2007. Roberts also worked as a diversity specialist at Microsoft and did local sports radio for the Seahawks. He became the head coach at Lake Washington High School in Kirkland in 2008, and resigned in June 2010 after posting consecutive 1–8 seasons.[3]
In 2015, Roberts moved back to Washington, where he worked at Rainier Scholars, a college enrichment program. Then in 2017, he left Rainier Scholars to work at Special Olympics where he currently works.
In 2022, Roberts launched a podcast called Big Ray's Garage Grind focusing on mental health and interviewing former Seahawks players on their journeys during their careers and after retirement, with guests including Tyler Lockett, Doug Baldwin, Cliff Avril and K.J. Wright.[6]