San Francisco 49ers wide receiver Dante Pettis left Wednesday's practice with what was being reported as a left knee injury, and did not practice on Thursday or Friday.

Ian Rapoport of NFL Network reported on Friday morning that Pettis suffered a sprained knee and that it is not considered to be a long-term injury.

Head coach Kyle Shanahan confirmed Rapoport's report on Friday, telling reporters that the second-year receiver will not play on Sunday against the Baltimore Ravens and is week-to-week with a sprained knee.

"He sprained his knee Wednesday," Shanahan said. "Just a non-contact drill. Him and a couple of players got tangled up, and just sprained his knee. He'll be week-to-week with that."

Shanahan wasn't able to clarify on the severity of the sprain.

The 49ers made Pettis a second-round draft pick out of Washington in 2018. He has just 11 receptions for 109 yards with two touchdowns through 11 games this season, but has been held without a catch during San Francisco's last three games.