PEORIA, Ariz. -- D-backs manager Kirk Gibson was not prepared to say Cody Ross would not be ready in time for Opening Day, but it does seem the outfielder's injured left calf is coming along slowly.
The team initially had hoped that Ross would begin weight-bearing activity March 18 or 19, but Gibson said that is not going to happen.
"It's just been slow," Gibson said. "He's done really no full weight-bearing stuff running-wise. He's not ready for it. I think he went in the pool yesterday. I think the next step will be the Ultra G [treadmill], which they can unload some of the weight when he runs."
Ross, who was signed to a three-year, $26 million deal this offseason, has not played since being removed early from a March 3 game against the Giants.
The D-backs still think there's a chance that Ross will not have to start the season on the disabled list.
"I don't know," Gibson said. "I hope so, but if he's not, then I know there's somebody else who wants his spot."
Steve Gilbert is a reporter for MLB.com. Follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.