SANTA CLARA — Brock Purdy and his troublesome toe are returning to the 49ers’ bench.

Mac Jones will start at quarterback as Purdy is sidelined for the third time in four games Thursday night when the 49ers (3-1) visit the Los Angeles Rams (3-1).

Purdy will have company on the SoFi Stadium sideline: wide receivers Ricky Pearsall (knee), Jauan Jennings (ribs, ankle) and Jordan Watkins (calf) also got ruled out Wednesday.

Jones will wear a left-knee brace after aggravating a posterior cruciate ligament sprain in the home-opeing win against Arizona. Jones also started the Week 2 win at New Orelans. Purdy returned for Sunday’s 26-21 loss to Jacksonville. Purdy said Tuesday that he wouldn’t be able to play if the 49ers were playing that night but left open hope he could push the decision unti

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