Check the packaging
If its frozen, it has about a 103% chance that it says "packaged in a solution of X%" where X is the amount of sodium in the water.
This is already sitting in a brine. To re-brine, is overkill
"Boots and Pants and Boots and Pants and Boots and Pants..." - Maxwell
Bandera, M-BGE, WSM, Gold Kettle, Kenmore Gasser, 36Qt Turkey Fryer, ECB, Dutch Oven