This started with the recent sad loss of Andy Marte, which got me wondering, somewhat morbidly, how many other former Diamondbacks had passed away. The answer, it turns out, is three (including Marte) of the 429 players ever to have appeared for Arizona. The other two are:
Brad Halsey. This is a sad story. Halsey came to Arizona in early 2005, as part of the Randy Johnson trade with the New York Yankees. He was part of the D-backs rotation that year, starting 26 times and compiling an 8-12 record with a 4.