If Pete Alonso is hurt, the obvious injury replacement is Dom Smitty. But if Marte is hurt, there's nothing obvious about it. Mark Vientos is on the injured list. Daniel Johnson hasn't yet hit in two organizations so far this season. Khalil Lee has shown power but not a lot of contact, and we know how that translated last season. They could call up an infielder and keep McNeil in the outfield, but of those on the roster, Gosuke Katoh has struggled to hit in AAA and Ronnie Mauricio is still trying to get some plate judgement in AA. If they can make room on the roster, they might add Blankenhorn, Wyatt Young, or Jake Mangum, who does most things but hit for power. I'll guess Mangum.