Arizona's pitching staff is throwing the ball really well right now, while also ranking third in the majors with a 3.36 road ERA - behind only the Reds and Nationals
Diamondbacks SP Ian Kennedy is 21-6 with a 2.95 ERA after the All-Star break in his career, which is why his 3-0 mark and 2.42 ERA in his last three efforts is no surprise after a slow start to the season
Both Kennedy and Philadelphia SP Joe Blanton have the ability of pitching late in the game, while both bullpens have been tremendous over the last 10 days - DBacks (1.52 ERA) and Phillies (0.73 ERA)
Blanton has done his best work during the months of August and September over the course of his career, posting a 14-6 (2.77 ERA) and 17-6 record (4.40 ERA) respectively.
I suggest taking a long look at this offering on the SBR Odds page, especially with Blanton (4-1 under) and Kennedy's (14-5-1 under) total numbers with a number of 7 to 8.5