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4/16/2014 4:13 P.M. ET

Montero's belief in rotation still strong

PHOENIX -- D-backs catcher Miguel Montero has a front-row seat when it comes to the struggles of Arizona's rotation, and he's not ready to give up on the starting pitchers.

"I know we're going to get out of this rut and have a good run," Montero said.

Entering Wednesday's game, the D-backs' rotation had the worst ERA in the Majors at 7.82, nearly two runs worse than the 29th-ranked Twins.

"I know it grinds on him," D-backs manager Kirk Gibson said of Montero. "Catchers take it personally."

Gibson added that Montero has been a vocal encourager of the pitchers -- as well as the entire team -- during games.

"One thing is for sure, I've got their backs," Montero said of the rotation. "I'm going to keep working to help them get better."

D-backs to stick with 12 pitchers when Ross returns

PHOENIX -- The D-backs expect to activate outfielder Cody Ross from the disabled list Friday, and when they do, they will take a pitcher off the roster rather than a position player.

Right now, the D-backs are carrying 12 position players and 13 pitchers.

Having 13 pitchers is generally one more than teams like to carry, but with their starters having averaged just five innings per start this year, the team has needed the extra arm in the bullpen.

However, the D-backs no longer want to leave themselves short on bench players, so there will be some roster juggling ahead.

Ross has been out since last August, when he suffered a fractured and dislocated right hip while running to first base.

Worth noting

• Infielder Eric Chavez jammed his right pinkie into second base Sunday while stretching a single into a double. The swelling prevented him from being able to swing a bat Monday, but he pinch-hit in Tuesday's game, and manager Kirk Gibson said he is OK now.

• Triple-A Reno pitcher Charles Brewer had his No. 20 retired by Chaparral (Ariz.) High School on Tuesday. Brewer was 33-0 in four years at Chaparral. The 2006 graduate helped lead the Firebirds to three state titles, and last year, he became the first Arizona-born player to make his Major League debut with the D-backs.

• Jimmie Sherfy, who was selected in the 10th round of last year's Draft, is 1-0 with four saves in his first five appearances for Class A Advanced Visalia.

Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @dbackswriter. This story was not subject to the approval of Major League Baseball or its clubs.