A.J. Pollock is closer to returning to the Arizona Diamondbacks after the star center fielder was cleared Friday to begin a minor-league rehab assignment.

Pollock, who has been sidelined for more than a month with a groin injury, ran the bases at full speed Friday and will play five innings Saturday for Triple-A Reno, according to Diamondbacks manager Torey Lovullo.

"He had a really good day [on Friday]," Lovullo told reporters, according to MLB.com. "He was on the bases, he ran through the bases, he got around the bases and tested it about as much as he could.

"We're all comfortable with getting him up there for rehab and seeing where that takes us."

Lovullo did not give a specific timeline for Pollock's rehab assignment but told reporters that he wanted Pollock to get at least 10-15 at-bats in the minors.

Pollock, 29, was batting .299 with 2 home runs, 26 runs scored an 11 stolen bases before suffering a Grade 1 groin strain on May 14. The Diamondbacks (42-26) have gone 21-8 in 29 games without Pollock.