I've confirmed that no Mets player has ever been older than his manager. But there have been a few times when an opposing player was older than the Mets manager. Warren Spahn was older than Wes Westrum. Hoyt Wilhelm was older than Gil Hodges and Yogi Berra. Dave Guisti, Manny Mota, Willie McCovey, Vic Davalillo, Lou Brock, Gaylord Perry, Willie Stargell, Woodie Fryman, Phil Niekro, and Jim Kaat were older than Joe Torre. Pete Rose, Tony Perez, and Jerry Koosman were older than Davey Johnson. And Erik Kratz was older than Luis Rojas. Nobody was older than Casey Stengel.