Harris was drafted by the Seahawks in the seventh-round of the 1978 NFL Draft. He played 11 years in the NFL, from 1978-88, eight with the Seahawks and three with the Vikings. During his Seahawks career, he started 111 of 119 games and had 41 interceptions, returning two for touchdowns. In 1981 he had a team high 10 interceptions, two of which he returned for touchdowns.