So far, Ross has only run on the AlterG treadmill, which has a harness that allows a percentage of one's body weight to be offloaded. Ross ran on the machine at 60 percent of his body weight.
In addition, Ross has been getting at-bats -- though not running -- in Minor League intrasquad games. Because he's able to hit as often as the team wants him to in those games, Ross got eight at-bats in one and 10 in another.
"I've been hitting, I've been throwing, I've been doing everything," Ross said. "It's a matter of just going out there and making sure I can run the bases and not reaggravate it. That's what is the big concern, trying to push it too much. The next thing you know it's a re-injury, and you're back to square one and it's another four-to-six weeks."
With center fielder Adam Eaton scheduled to miss six-to-eight weeks with an elbow injury, the last thing the D-backs want to do is lose another outfielder for an extended period.
That makes it more likely that they would put Ross on the disabled list to start the year and have him miss a week or two rather than risk a longer absence.
"You open up the season on the DL, fans are upset and everyone is upset," Ross said. "But at the end of the day, it's better if you take the extra time and you're healthy down the stretch as opposed to playing Opening Day and blowing out, and the next thing you know it's the All-Star break and you're trying to get back. These are all the things we're talking about."
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.