Rotation takes another hit as Cahill goes on DL

D-backs' rotation takes another hit as struggling Cahill goes on DL; reliever Roe called up.

One day after the worst statistical month of his career came to an end, Diamondbacks starting pitcher Trevor Cahill was placed on the 15-day disabled list with a right hip contusion.

The injury is the same one that knocked him out of a June 19 game against the Marlins after one inning. Cahill took a line drive off his hip at the end of the first inning and warmed up for the second inning before being removed for precautionary reasons.

Cahill said after that game that he was confident the injury wouldn't be an issue before his next start. Cahill made that next start, giving up six runs in five innings. He also gave up six runs in 4 1/3 innings Sunday to drop to 3-10 with a 4.66 ERA on the season.

In six June starts, Cahill went 0-5 with a 9.85 ERA. The D-backs won only one of those games -- the game he left after an inning, as Josh Collmenter came on and threw six scoreless innings.

To replace Cahill on the big league roster, the D-backs added 26-year-old reliever Chaz Roe from Triple-A Reno. Roe, who had four saves and a 2.00 ERA in nine appearances at Reno, seems likely to work out of the bullpen until Cahill's next turn in the rotation, at which time the D-backs could recall another starting pitcher.

Cahill's trip to the DL is the latest hit to the D-backs' starting rotation. Brandon McCarthy is also on the DL with shoulder inflammation, and his timetable remains unclear. Ian Kennedy just finished a 10-game suspension and has been ineffective most of the season. Daniel Hudson was expected back from Tommy John surgery sometime this summer but recently re-tore his ulnar collateral ligament during a rehab start and had to undergo a second surgery.

The earliest Cahill could return is July 19, the day after the All-Star break. That would give him a little more than the typical 15 days of recovery time. By that point, the D-backs' rotation picture could be even more up in the air, as it's been reported that the team will consider its trade options barring improvement and increased consistency from its starters.

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