Too late to tack on additional LOR?

[supposedscolding]

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So I hadn't asked my PI (whose lab I was in all through college save COVID) for an LOR as a death in the family had caused my lab performance to suffer significantly and I was afraid that it would be negative, but I spoke with him lately and it turned out he had one READY TO GO for me and would be positive, just noting the diminished performance as a result of grief. Is it too late to ask him to send it through AMCAS, or should I do it anyway?