Soto was removed from Tuesday's contest against the Cubs in the fifth inning due to left side back tightness.
Soto was spotted wearing a heating pad on his back earlier in the game, and the Mets ultimately decided to take him out of the game after the fourth inning. The 27-year-old went 0-for-2 in his two at-bats, and more information on his status will likely be provided in the near future. In the meantime, Jared Young has shifted to left field while Mark Vientos has now entered the lineup at first base.