Did Kevin Klein already play his last game as a Ranger?

Kevin Klein, whose spot in the lineup would seem to be in jeopardy if the Rangers pull off a deal for a right-side defenseman, sat out his second straight game in New Jersey on Saturday in the aftermath of back spasms that first developed during Thursday morning’s skate in Toronto.

Coach Alain Vigneault said the veteran also would be sidelined for at least Sunday’s match at the Garden against the Blue Jackets. And as the Rangers are not scheduled to practice on Monday, that also would seem to rule No. 8 out of Tuesday’s game at home against the Canadiens, the final game before Wednesday’s 3 p.m. trade deadline.

Adam Clendening, who has played five of the last eight games and 14 of the last…