DENVER -- Still tentative on the bases, Rockies shortstop Troy Tulowitzki is not sure he'll be able to return to the lineup when Major League rosters expand to 40 on Saturday. Tulowitzki, who hasn't played since the end of May because of a left groin injury that required surgery to remove scar tissue, is 3-for-10 with a home run and a double in three injury rehab games at Double-A Tulsa. Tulowitzki and veteran first baseman Jason Giambi, who is recovering from viral syndrome and also has played three games at Tulsa, will join Triple-A Colorado Springs on Wednesday to continue their rehab assignments. "[Saturday] was the goal from a long time ago, but after playing in these games I'm just not sure what the exact timetable is," Tulowitzki said. "These next three days, if I make a lot of progress, that could become a possibility. Each day I get a little bit more confident.
"For those people that weren't there to watch me play [in Tulsa], it's definitely station-to-station for right now. You don't want to do that at the big league level. If the ball is hit to right field, you want to be able to go first to third out of respect for the game and respect for your teammates who are trying to win a game. Station-to-station is not who I am as a player." Tulowitzki attempted a comeback in June but was injured his first time on the bases at Colorado Springs. The injury led to further examination, which led to surgery. Now he is understandably wary. "I'm just timid," Tulowitzki said. "Last time when I went out I got hurt again, so it's definitely on my mind. Each game I've made improvements." Defensively, Tulowitzki has handled just two ground balls in this two games in the field.