Perry, 73, pitched for the Mariners in 1982 and '83. The five-time All-Star won 314 games in his career, including 13 with Seattle in his second-to-last stop in a 22-year career.
Perry returns to Seattle as part of the Mariners 35th Anniversary celebration, a season-long tribute to the franchise's history in which former players are welcomed back for special appearances and promotions.
Perry posted a 314-265 record over his career with a 3.11 ERA and 3,534 strikeouts. He was a five-time All-Star, a five-time 20-game winner and the first pitcher to win Cy Young Awards in both the American (1972) and National Leagues (1978).
He was inducted into the National Baseball Hall of Fame in 1991.