The New York Mets got some relieving news Monday when an MRI on star shortstop Francisco Lindor’s back came back clean.Lindor told reporters that he “should be back” before the end of the season and that the “best-case scenario” would be a return during the Mets’ series against the Washington Nationals, which runs Monday through Wednesday.The Mets are in a dead heat with the Atlanta Braves for the final wild card in the National League. They entered Monday tied at 81-68, though the Mets have been cooling off with three losses in their past five games following a red-hot run in late August and early September.Lindor departed Friday’s game due to lower-back pain and sat out Saturday for his first missed game of the season. He attempted to play on Sunday and singled to lead off the game, but his movement was limited while fielding a grounder in the bottom of the first.