He has worse stuff than them and costs more and is less of a "trooper" and less likely to be on a playoff roster even in a nightmare (team bus accident) scenario.
Like the thought process was probably something like... Ross: "okay, if half of the pitchers get septic hemorrhoids the night before the ALCS and we have to call up SIX pitchers from the 40 man roster, which SIX make it?"
And the analyst said "Bruihl, Estrada, Lucas, Macko, Pina, and Tate" so they cut the odd man out.