Doc Gooden says he's officially ending his public feud with Darryl Strawberry ... telling TMZ Sports, "I'm moving on with my life" after trading nasty barbs with his ex-Mets teammate. 

Things went south between Doc and Darryl on Thursday -- when Doc no-showed at an event and Strawberry chalked it up to drugs. 

"My fear is that -- and I know addiction -- and my fear is people that don’t change, they die," Strawberry told the crowd ... "I just hope the light comes on soon before it’s too late."

Gooden was PISSED -- and responded on Monday night by not only declaring he's been sober for 4 years ... but also accusing Strawberry of infidelity. 

"Darryl has a drug rehab in his name, he is supposed to be a pastor. I call him Lucifer," Doc said.

But Gooden now tells TMZ Sports he's calling off his attack -- and officially ENDING his war on Strawberry. 

"I've been doing interviews for over 2 days. I'm sorry, I'm over this. I'm done with the Straw stuff. I'm moving on with my life."