Gregorius, who was acquired by the D-backs in December in a three-team trade that involved Trevor Bauer, suffered a slight strain of the ulnar collateral ligament area in his elbow around Christmastime. The team wanted to be extra cautious with him, so he was shut down from swinging a bat or throwing.
"I'll be throwing in a couple of weeks, and next week I'm going to start hitting and we'll take it from there," said Gregorius, ranked No. 3 among the D-backs' top prospects.
The injury scuttled the long shot hopes Gregorius had of making the team out of Spring Training.