Coach Kyle Shanahan said after Thursday night's win over the Rams that Tonges' knee injury "does not look good," Vic Tafur of The Athletic reports.
Tonges hobbled off with the assistance of trainers in the second quarter against Los Angeles and was quickly ruled out for the remainder of the contest. He now appears to be looking at an extended absence. Luke Farrell soaked up the TE2 snaps behind George Kittle following Tonges' departure.