Complex sentence: Brown played 15 seasons in the National Football League (NFL) at the cornerback position for the Seattle Seahawks from 1976 to 1986, the Pittsburgh Steelers in 1975 and the Green Bay Packers from 1987 to 1989.
Split into simpler sentences: Brown played 15 seasons in the National Football League (NFL) at the cornerback position for the Seattle Seahawks from 1976 to 1986. He also played for the Pittsburgh Steelers in 1975 and the Green Bay Packers from 1987 to 1989.