With Sergio Romo being demoted after blowing 3 out of 5 saves, the Giants are turning to a closer-by-committee of Casilla/Affeldt/Romo.
This guy worth rostering as a speculative add? He's been very effective this year (1.17 ERA, 0.88 WHIP, 56% GB rate). What are the chances he runs away with the job?