Since about 2012, the Pittsburgh Pirates corner outfielders were formerly center fielders coming up through the minors that were moved to a corner because of being blocked in center. Starling Marte and Gregory Polanco were both primary center fielders coming up through the minors, but were moved to left and right field once they got to the MLB level. Bryan Reynolds also played quite a bit of center field in previous minor league seasons before becoming primarily a left fielder in the 2019 season.
Right now, nobody is blocking any prospect from taking over in center on the MLB roster.