You may have a workers' comp retaliation claim. You should consult in person (as soon as possible) with a workers' comp attorney. Good luck.
My answers to questions posted on AVVO are intended to provide general information only, and are not intended to be legal advice. Employment law issues typically require a careful case-by-case analysis. Consequently, if you feel that you need legal advice, I would encourage you to consult in person with an employment attorney in your area.
This answer is based on my knowledge of CA law:
Generally retaliation for filing a worker's compensation claim is compensable only under the labor code. As such there is no real claim for "wrongful termination" when you are fired for filing for worker's comp. At least in CA, the labor code generally specifies what damages are available when an employee is unlawfully terminated for filing a worker's compensation claim. Under some circumstances your injuries may qualify you as disabled. I have seen numerous successful cases where a worker was temporarily injured and able to claim that she/he was fired for disability discrimination. The laws here in CA are very protective of employees thus you will want to consult with an attorney before applying any novel approach to remedy your claims in MA.