If an employer has six or more employees, it is unlawful for that employer to take any adverse employment action against an employee because that employee invoked the workers’ compensation system. In other words, Oregon employers cannot retaliate against an employee for seeking workers’ compensation.
ORS 659A.040, reads (at the time of this post):
It is an unlawful employment practice for an employer to discriminate against a worker with respect to hire or tenure or any term or condition of employment because the worker has applied for benefits or invoked or utilized the procedures provided for in [the workers' compensation law] or has given testimony under the provisions of those laws.
If you believe that you have been fired or otherwise discriminated against because you invoked the workers’ compensation law, I would strongly recommend that you contact a lawyer right away.