Ned Colletti

The Dodgers DON'T need to make a splash and re-sign Manny Machado ... so says their ex-GM, Ned Colletti, who tells TMZ Sports the team already has enough talent!! Ned -- who oversaw the Dodgers' baseball ops from 2006 through 2014 -- says with Corey Seager at shortstop and Justin Turner at third…

Good news Dodger fans ... the team's epic collapse ain't NOTHING to fret about -- so says ex-GM Ned Colletti, who assured TMZ Sports that everything was A-OK when we got him out in Beverly Hills. Okay, so here's the thing -- the Dodgers are in the middle of an EPIC slump, losing 16 out of their…