Lambert-Smith did not garner a target during Sunday's 24-9 loss to the Rams.
Kolar caught one of four targets for 20 yards in Sunday's 24-9 loss to the Rams.
Harris caught all three of his targets for 31 yards in Sunday's 24-9 loss to the Rams.
Mitchell rushed four times for six yards and caught all three of his targets for 17 yards in Sunday's 24-9 loss to the Rams.
Thompson (quadriceps/hamstring) is not expected to practice this week, Noah Furtado of The Athletic reports.
Boswell made two of his three field-goal attempts and all three PATs in the Steelers' 27-6 win over the Browns on Sunday.
Dicker made all three of his field-goal attempts during Sunday's 24-9 loss against the Rams. He did not kick any extra-point tries.
Vidal rushed eight times for 23 yards and caught both of his targets for seven yards in Sunday's 24-9 loss to the Rams.
Coach Jim Harbaugh said Monday that the Chargers will likely open the return window for Njoku (fibula) this week, Alex Insdorf of BoltBeat.com reports.
Pittman (foot) said Monday that he resumed running last week as part of a program to return, but the wideout acknowledged that he's without a clear timeline to be activated from injured reserve, Ray Fittipaldo of the Pittsburgh Post-Gazette reports.
