Just when it couldn’t get any worse for the Mets, Juan Soto was removed from Tuesday’s game against the Cubs to start the top of the fifth at Citi Field with what the team later called left side back tightness.

After the Mets’ 9-6 loss, manager Carlos Mendoza said Soto is considered day-to-day.

Jared Young moved from first base to take Soto’s spot in left, while Mark Vientos entered at first base.

It comes as Francisco Lindor was playing perhaps his final minor league rehab game with Triple-A Syracuse after being sidelined since April with a strained calf.

Soto also missed time early in the second with a calf injury.