Photography: Jordan Megenhardt

Justin Upton is listed as day-to-day with a strain of his left (non-throwing) shoulder. Upton underwent an MRI on Tuesday, at which point D-backs team doctor Michael Lee informed interim General Manager Jerry Dipoto that there was indeed a strain.

Dipoto said the strain dates back to a shoulder injury in 2007, which itself may date back to the outfielder’s amateur days.

Upton’s timetable for return is uncertain, though it appears unlikely he’ll be returning in the immediate future.

“There is no sense in rushing him,” Dipoto said. “We’ll give him every opportunity to heal.”

Dipoto said Upton is currently working on a strength program with the D-backs’ conditioning staff.