Roger Clemens and David Wells will be forever linked for last spring's blockbuster trade, but they won't share New York City any time soon. Clemens, officially giving up his right to demand a trade yesterday, will apparently remain with the Yankees, and the Mets' trade talks with Toronto regarding Wells and the slugger Carlos Delgado have collapsed.

The Yankees have agreed in principal on a multiyear contract with the left-handed reliever Mike Stanton, according to a Major League Baseball official, although there remain issues to be completed before the terms of the deal will be announced. Darryl Hamilton, the Mets' center fielder acquired from Colorado last summer, did exercise his right to demand a trade, an issue that must be resolved by March 15.

On Tuesday, the Mets and the Blue Jays discussed at length a large trade, in which the Mets would have shipped the pitchers Octavio Dotel and Masato Yoshii, and the outfielders Roger Cedeno and Jay Payton, to the Blue Jays for Wells, who is signed through the 2001 season, and the first baseman Delgado, who has rejected contract offers from the Blue Jays and can become a free agent after next season.

But the talks fell apart yesterday as the Blue Jays traded another established pitcher, Pat Hentgen, to the St. Louis Cardinals as part of a five-player deal. Now that Toronto has shed Hentgen's $6 million salary, some team executives wonder whether the Blue Jays won't feel so pressured to move Wells; Gord Ash, the general manager of Toronto, reportedly said he could still forecast ''a scenario where'' Wells would be traded.