Pollard was returning from a shoulder injury as he began light, non-contact, training when he sustained the injury.
According to Bulls coach Nollis Marais, the player was busy with a passing drill when he sustained the injury.
Scans later revealed Pollard would be ruled out of action between six and nine months.
The Bulls have already been hit by other injury blows with Deon Stegmann and Lappies Labuschagne also battling to return to full fitness.
African News Agency
Original source: Pollard out for entire Super Rugby tournament