Lew Brown played for Providence, at least two Boston clubs, and assorted other teams during a seven-year career. He retired, it would seem, following his age-26 season. In January of 1889, just weeks short of his 31st birthday, he somehow broke his kneepan (an antiquated word for kneecap) on a stone cuspiodor (i.e. a spittoon) whilst wrestling. Then, somehow, he immediately contracted pneumonia, became delirious, and then died.
Cause of death, ultimately: the 19th century.
Carson Cistulli has published a book of aphorisms called Spirited Ejaculations of a New Enthusiast.