Brown had been signed as a Temporary Replacement Player for Ruth Aryang and has made three appearances so far this season.
The Nominated Athlete Upgrade (11th player) allows clubs to sign an additional athlete who can be brought into the match day squad for tactical purposes throughout the season, not just in the case of injury or illness to a contracted athlete.
Fever General Manager Sara Francis-Bayman said: “Caitlyn has been an integral part of the Fever squad this season, and we’ve been thrilled to see her making the most of every opportunity on the SSN court.
“She brings fantastic strength to our defensive end, and her hard work and determination have truly paid off in earning this moment.
“Having her as part of our 11 for the rest of the season will create competition for spots and we know she will be ready to impact if she comes into the team.”
