tinkerman

/ ˈtɪŋkəˌmən /

noun

1. informal.
   soccer a manager or coach who continually experiments by changing the personnel or formation of a team from game to game

Example Sentences

Hysterical tinkerman Ralf Rangnick makes 11 changes for the second game in a row, reverting to the team that beat Crystal Palace last weekend.

From The Guardian

The 'Tinkerman' nickname he was given at Chelsea and the famous 'dilly-ding, dilly-dong' catchphrase he coined at Leicester as he tried to take the pressure off his players on the run-in to their momentous achievement have gone down in Premier League folklore.

From BBC

The Premier League’s original Tinkerman, Claudio Ranieri, knows all about the benefits and perils of high-intensity squad juggling, and it will not have gone unnoticed how Emery has attacked this project with a penchant for impatiently shuffling his pack – before and during games.

From The Guardian

As Ranieri was known as the Tinkerman for his habit of constantly changing team lineups when he was at Chelsea, it was a safe bet that he would change things around.

From The Guardian

The great tinkerman, perhaps over-enthused by the waves of fan-love suddenly coursing his way, abandoned the instincts of a lifetime and sent out exactly the same starting XI to face Sweden as had overcome South Korea.

From The Guardian