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D-backs move struggling Cahill to bullpen

PHOENIX -- Struggling D-backs right-hander Trevor Cahill will have to get his issues worked out in the bullpen.

The D-backs will shift Cahill to the bullpen and replace him with right-hander Mike Bolsinger, who was called up Monday and will make his first start Saturday against the Dodgers in Los Angeles.

Cahill, who allowed seven runs while lasting just four innings Sunday against the Dodgers, has a 9.17 ERA in four starts and has struggled for the better part of the past two seasons.

"Just executing pitches," Cahill said when asked what he needs to do to improve. "It comes down to that. Walks hurt me most of all."

Cahill has walked 13 in 17 2/3 innings this year.

The D-backs desperately would like to get Cahill back on track. They traded away Jarrod Parker for him after the 2011 season and still owe him $7.7 million this year and $12 million in 2015.

The only relief appearance Cahill has made in his big league career came last year when a D-backs game with the Phillies went 18 innings.

"It might take a little pressure off him," D-backs general manager Kevin Towers said. "I think for him, the good thing is he doesn't know when he's going to pitch."

Steve Gilbert is a reporter for Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB.
Read More: Arizona Diamondbacks, Trevor Cahill