Worth noting

• Right-hander Bronson Arroyo has a stiff lower back and won't pitch against the Padres on Tuesday. Randall Delgado, who figures to open the season in the bullpen, will start instead. 

Kirk Gibson said Arroyo may be shut down for a few days and won't be ready for the Australia trip, which is less than two weeks away. 

"He's not going to make it," Gibson said. "Right now, he's not in our plans."

Whether Delgado starts the year in the bullpen or not, the team wants to keep him stretched out innings-wise just in case there is an injury to a starting pitcher as the season approaches.

• Injured outfielder Cody Ross ran the bases on Monday for the first time since sustaining a fractured and dislocated right hip last August.

Ross, who ran the bases at 60-70 percent, is scheduled to play in a simulated Minor League game Tuesday afternoon on a back field.

"We're going to start picking up his activity," D-backs manager Kirk Gibson said.

• Danny Dorn fouled a ball that deflected off his right wrist. According to general manager Kevin Towers, Dorn has a non-displaced fracture of the wrist and will not be able to participate in baseball activities for six weeks. Dorn is a non-roster outfielder.

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