This article suggests DJ could be back in time for Friday's game at Coors.
"While rehabbing from a sprained left thumb and small broken bone in that thumb, LeMahieu went 1-for-5 and played five innings of defense on Tuesday afternoon in extended spring training at the Rockies facilities at Salt River Fields at Talking Stick in Scottsdale, Ariz.
LeMahieu could see one or two more days of action in Arizona before Colorado makes a decision on when to bring him back. Rumors are swirling that, without a setback, LeMahieu could be back in the Colorado lineup in time for Friday’s series opener against the Los Angeles Dodgers at Coors Field.
Black said the decision to send LeMahieu to extended spring training rather than on the road with Colorado’s Triple-A team involved the 29-year-old second baseman getting multiple at-bats and having access to the facilities and cages at Salt River under the watchful eyes of Rockies personnel."