Gray didn't practice Thursday due to a hip issue, Eric Branch of the San Francisco Chronicle reports.
During the portion of Thursday's session open to the media, Gray wasn't taking part while wearing a sleeve on his right leg, according to Matt Barrows of The Athletic. Now that the reason for his absence is known, Gray's status bears monitoring ahead of Monday's game against the Rams. If he's able to play, the rookie third-round pick still is in search of his first career catch.