"I don't give two sh*ts about your collective bargaining agreement and neither does anybody else right now!"
That's former MLB star Eric Byrnes going IN on players and owners for their roles in a nasty, public CBA feud ... telling TMZ Sports he thinks both parties need to shut up and just get back on the diamond.
"I don't think anyone in our society right now wants to hear about the bickering between billionaires and millionaires," Byrnes says ... "No one wants to hear your petty arguments between ownership and players right now.