sentences:  He was named Pittsburgh Steelers' Most Valuable Player in 1987.After a salary dispute which saw him sit out the entire 1988 season, he was traded to the Minnesota Vikings for a first-round pick.In 1989, his first season at Minnesota, he became the first player in NFL history to score the winning points in an overtime game with a safety when he blocked a punt out of the end zone in a game against the Los Angeles Rams for a final score of 23-21, the same game in which the Vikings' Rich Karlis had scored a then-record 7 field goals to get the 21 points that sent the game into overtime.