The Raiders fired their OC earlier this season, and are in need of filling this role full time. The Raiders have expressed interest in Getsy for his run-game success, but have not mentioned his pass-game.
All season long, Bears fans have been waiting for the team to fire Getsy due to his predictable and boring pass-game calls, something that has put a negative look on QB Justin Fields.
Most of Getsy's play calling was around screen passes, and those got predictable very quickly. Getsy is not a creative play caller, so a move like this for the Raiders is confusing.