Suits: worn by Derek Fisher and Jason Kidd, recent NBA players, to coach.

Suits, the TV show on AMC

Derek Fisher Born: August 9, 1974 (Age 40.182) in Little Rock, Arkansas; NBA 1996-2014

Jason Kidd Born: March 23, 1973 (Age 41.321) in San Francisco, California; NBA 1994-2013

Both are young enough to still look reasonably presentable in an NBA uniform.  Both could probably perform as a player/coach.  However, both retired and immediately became head coaches in the National Basketball Association (NBA): Kidd in 2013 with the Brooklyn Nets (left after one season to coach the Milwaukee Bucks), Fisher in 2014 with the New York Knicks.  There are some former big name NBA players who are assistant coaches, including Patrick Ewing and Bob McAdoo.  They wear a suit and tie when coaching during games.  In practices they wear informal clothes, which I think is how they should dress during games, too, but that's another matter.

In the Major Baseball League (MBL), the head coach, still known as the manager even though he no longer manages the team in any real sense, and all the assistant coaches dress in the same type of uniform as their active players.  Many, maybe most, look ridiculous.  The owners and general mangers might as well suit up, too. I think that Burt Shotton and Connie Mack were most recent managers to dress in suits while managing a baseball team and that was around 1950.

The manager being in uniform traces to managers who also were active players.  Catcher Mickey Cochrane was voted American League (AL) MVP in 1934 as player/manager of the pennant winning Detroit Tigers.  In 1948 shortstop Lou Boudreau was AL MVP and player/manager of the pennant winning Cleveland Indians.  But in recent decades the only player/managers have been Frank Robinson, Joe Torre and Pete Rose.  Rose played his last game August 17, 1986 (Age 45.125) and managed the Cincinnati Reds all or parts of the 1984-1989 seasons.

Team members not in uniform are not allowed on the baseball field during a game.  That's another advantage to getting the manager and coaches out of uniform: they may not interrupt games with all those ridiculous meetings and arguments.

I'd like to see baseball coaches in informal non-uniform attire but I'd settle for suits.