Amakhosi unveiled Castro as their player after reaching an agreement with Mamelodi Sundowns in mid-December, but French publication L’Equipe reports that the 28-year-old could soon make a move to Europe.
The South American marksman even bid farewell to his former teammates at Sundowns prior to making a switch to the Soweto giants.
It is unclear at this stage whether or not Castro has already signed on the dotted line with Chiefs.
However, while the club fans were excited with the acquisition of Castro, the lanky striker hasn't been allocated a shirt number as yet.
He was only expected to be registered with the PSL from today [Tuesday], according to the rules of the league.
Both Chiefs and Sundowns haven't responded to the report.