Karl Pryce and Phil Joseph have joined the list of departures from Odsal as Francis Cummins continues stamping his mark on the Bulls.
The pair were recruited last winter on one-year contracts but have been told they will not be handed new deals.
That has brought the number of confirmed exits of out-of-contract players from the 2012 squad to ten, with untried youngster Alex Ball also departing the club.
But there is no place for Bradford-born winger Pryce, who scored 13 tries last term after returning to the club from Wigan.
Forward Joseph enjoyed an impressive pre- season but endured an injury-disrupted campaign and made just six first-team appearances.
The Bulls could discover this week the outcome of the RFL investigation into the circumstances which led to Craig Kopczak terminating his contract with the club.
RFL officials have been conducting interviews with a number of parties, including Kopczak himself, with the player’s future still unclear.
Meanwhile, rookie Callum Windley has joined Hunslet Hawks on a one-year contract.
He made his only appearance for the Bulls off the bench in the Challenge Cup win over Doncaster in April.