A long, colorful career in baseball appears to be over.
The 71-year-old Collins, who managed the Mets from 2011 to 2017, had been working as an advisor under former GM Brodie Van Wagenen, whose time with the Mets ended upon Steve Cohen and Sandy Alderson's arrival -- with Van Wagenen's top lieutenants also leaving the organization.
Collins' name came up last offseason when the Mets were seeking a replacement for Carlos Beltran, but a return to the dugout never gained serious traction.
During Collins' tenure as Mets manager, he was at the helm for New York's trip to the World Series in 2015 and to the Wild Card game the following season.
Prior to managing the Mets, Collins had managerial stints with the Houston Astros and then-Anaheim Angels.
Collins' two most talked-about Mets moments were leaving Johan Santana in to throw 134 pitches and the Mets' first (and still only) no hitter in 2012, and sticking with Matt Harvey in the ninth inning against the Kansas City Royals in Game 5 of the 2015 World Series at Citi Field.
While easy to second-guess the Santana move, he suffered no ill-effects in the few starts after. It was actually an ankle injury that did him in later that season.
As far as the Harvey decision, Collins' mistake there wasn't sticking with a dominant Harvey to start the ninth. It was leaving him in after he walked Lorenzo Cain to start the inning.
If Collins is officially retired, he ends his career with a career managerial record of 995-1,017.