The club contracted four more Surinamese footballers; his brother Frank Mijnals, Erwin Sparendam, Michel Kruin and Charley Marbach, collectively known as the "five-leaf clover".

He debuted in the Netherlands national football team on 3 April 1960 in a home match against Bulgaria.

Mijnals, nicknamed Minna, is best known for clearing a Bulgarian attempt on goal with an overhead kick.

The conflict arose after a training trip to South and Central America; he complained about the game and selection policy to a journalist, which resulted in him being placed on the list of unwanted players by the association.

Mijnals also played 45 times in the Suriname national football team.