Cody Ross's left calf injury is progressing slower than the team had originally hoped.
"It's just been slow," Diamondbacks manager Kirk 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." The team had hoped Ross would be able to begin full weight-bearing activities by Tuesday or Wednesday, but that isn't going to happen. His status for Opening Day is officially in doubt.