*** SGC9 *** 1997 Skybox Metal Universe Ken Griffey Jr #4 Magnetic Field trading card is a highly collectible item featuring the Seattle Mariners outfielder. Graded as a 9 by Sportscard Guaranty Corporation (SGC), this original card from the MLB World Series season of 1997 is a valuable addition to any baseball card collection. With its unique metal material and insert set design, this card showcases Ken Griffey Jr during his reign as a top player in Major League Baseball (MLB).