Greenlaw (undisclosed) was a participant in Thursday's training camp session, Cam Inman of The San Jose Mercury News reports.
Greenlaw missed Wednesday's session with an undisclosed issue, but he's promptly returned to the field. The veteran linebacker returned to the 49ers, with whom he spent the first six seasons of his career, this offseason on a one-year deal after a one-year, injury-shortened stint with the Broncos, and he's expected to start at left outside linebacker in 2026.