"I don't expect he'll be ready. But he's moving in the right direction, so who knows?" Gibbons said.
Tulowitzki's 2017 season ended on July 28 when he sprained his right ankle and also suffered ligament damage.
Tulowitzki, 33, was hitting .249 with seven home runs and 26 RBIs at the time of his injury last season. He is a career .290 hitter with 224 home runs and 779 RBIs in 12 major league seasons.