03 Tacoma 3rd ball joint replacement?

I can't believe this - I'm about to replace ball joints for the 3rd time! I had the lower right ball joint replaced under the recall, less than 3 years later the front end felt loose again, had both lower ball joints replaced, felt nice and tight again, and now 2 years later it feels loose AGAIN! New mechanic says the uppers are sagging, but the lowers are loose as well, especially the right front. Has no one else eperienced this?? 3rd time replacing the ball joints in 8 years! (On the 2nd round the right tie rod was replaced too)