A patient hospitalized with severe COVID-19 developed an unusual infection caused by a mold called Sarocladium implicatum, which typically affects plants. Due to weakened immune system from his illness and medications, the fungus spread to his bloodstream and lungs, causing persistent fever and a cavity in his lung. After molecular testing identified the fungus, he was treated with an antifungal medication called voriconazole, which successfully cured the infection.