Nearly four hours before Saturday's first pitch, Rockies shortstop Troy Tulowitzki fielded groundballs and ran at roughly 70 percent, his first measurable progress since landing on the disabled list May 31 with a strained left groin. Tulowitzki also hit lightly in the batting cage with no problems and will attempt to run more Sunday as he creeps closer toward a likely two- or three-game rehab assignment. Tulowitzki is eligible to return from the disabled list Friday in Detroit. "Can I make that? Possibly," Tulowitzki said. "I have to see how the rehab games go." If nothing else, the past week proved he could not have nursed the injury to avoid the DL. He was not ready. "This is the most I have done, and it feels good," Tulowitzki said. "But there's no way I could have played on that fourth or fifth day (after the injury). When I walked into the clubhouse on those days, I had no chance. At the end of the day, there's nothing I can do but prepare myself to get back out there. I can't beat myself up about it. I just look forward to playing and making up for lost time." The two-time all-star shortstop said the biggest test will be running the bases and taking the first step out of the batter's box.