Currently on the Marlins 40-man roster in the infield, they have Jesus Aguilar, Brian Anderson, Jon Berti, Jazz Chisholm, Isan Diaz, Lewin Diaz, Miguel Rojas, and Jonathan Villar.
With Anderson and Berti likely outfield-bound, Chisholm and Lewin Diaz probably minors-bound, and Aguilar locked in over at first (likely with Garrett Cooper), that leaves Isan Diaz, Rojas, and Villar to man the other three positions.
Pliability when it comes to positions is a great thing to have, and the Marlins already know it.