SANTA CLARA – Six weeks after aggravating his toe injury, Brock Purdy is still not reclaiming his starting role for Sunday’s visit by the Los Angeles Rams.

Mac Jones again will start and look to improve on his 5-2 record in place of Purdy, who may or may not suit up as a potential backup, coach Kyle Shanahan announced after Friday’s practice.

The injury-ravaged 49ers (6-3) will face the NFL’s second-stingiest scoring defense (15.9 points per game) brought in by the Rams (6-2).

Purdy is listed as questionable, as are defensive linemen Alfred Collins, Kalia Davis and Keion White; linebackers Dee Winters and Tatum Bethune; and left guard Ben Bartch, who will be activated off Injured Reserve on Saturday.

Collins (hip), Davis (ankle) and White (groin) all sustained injuries in Thursday’s pr

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