Former international spinner Mitch Swepson is leaving the Brisbane Heat in a shock deadline-day signing by Melbourne Stars.

One of the longest standing Big Bash League spinners is on the move, joining a team which finished the season in red-hot form.

Under Craig Fitzgibbon, Cronulla have won just one finals game in their past six appearances despite consistently being entrenched within the top four. Can Addin Fonua-Blake change their fortunes?