The Kansas City Royals organization is mourning the death of Bob Boone, the durable, defense-first catcher who closed his playing career in a Royals uniform and later managed the club.

Boone, 78, died Monday; his son Bret announced the news the following day. No cause of death was given.

Boone’s connection to Kansas City ran deeper than a late-career stop.

In 1980, he was the Phillies catcher who helped end the Royals’ World Series hopes, batting .412 in the series Philadelphia won in six games.

Nine years later, at age 41, the Royals signed the free agent to handle their pitching staff. In 1989 he started 127 games, hit .274 with 43 RBIs, and won his seventh and final Gold Glove—the oldest catcher ever to claim the award and the first Gold Glove earned by a Royals catcher.

He mentored backup Mike Macfarlane while still performing at an elite defensive level, throwing out more than 40 percent of baserunners.

After a limited 1990 season he retired as a player, then returned in 1995 as Royals manager, succeeding Hal McRae.

George Brett, then vice president of baseball operations, supported the hire, noting Boone’s qualifications beyond their prior teammate relationship.

Boone promised a club of “warriors” who would “do or die every single night.” Over roughly two and a half seasons his teams went 181-206.

He was dismissed in July 1997 with the club at 36-46. In a later interview he accepted the standard managerial reality: “If you don’t win, it’s your fault.”

The Royals issued a brief statement: “Bob Boone was a leader, a manager, and our first Gold Glove winning catcher. We honor his impact on our game, and send our thoughts and strength to his family.”

Boone’s baseball life stretched far beyond Kansas City.

He was a four-time All-Star and 1980 World Series champion with Philadelphia, spent seven seasons with the Angels, managed the Reds, and later worked in the Nationals’ front office during their 2019 championship.

He formed the middle generation of baseball’s first three-generation All-Star family—his father Ray had played for the Kansas City Athletics, and sons Aaron (now Yankees manager) and Bret reached the majors.

Yet for Royals fans, the lasting image is of the veteran in powder blue, still the best defensive catcher in the league at an age when most had long since hung up the gear.