There's bad blood in this series. So this isn't going to be some sleepy non-division game for the Pirates. They will be up for this matchup especially after blowing a 5-0 seventh inning lead against the Diamondbacks last night.
Trevor Williams is ptiching on extra rest. He's 7-1 the past eight times he has started on five days rest. Williams was pitching better earlier in the season than he is now, but he'll be extra motivated here. He's an Arizona State alum. Williams faced the Diamondbacks twice last season and gave up two runs in 11 innings.
Diamondbacks starter Clay Buchholz has been pitching well, but some regression is due for the 33-year-old, who has a fragile arm.