Diaz (1-2) allowed a walkoff home run in the bottom of the ninth inning during Sunday's loss to Toronto.
It was the fourth homer of the season allowed by Diaz, and his 2.4 HR/9 is a real eyesore. Remember that the converted starter went straight from Double-A Jackson to the majors last year, so while Diaz's debut was spectacular last season, his inexperience could be catching up to him. His 12.0 K/9 is still an admirable mark, and until there are sincere rumblings that his closer job is in jeopardy, it's probably worth taking the good with the bad in hopes that Diaz rights the ship.