ROSTERED: 0.3%

Next man up (again)? Isaac Guerendo was the player to pick up on the waiver wire last week after Christian McCaffrey and Jordan Mason landed on injured reserve. Guerendo’s rostered percentage jumped from 0.6 to 72 before he sliced through the Bears defense on Sunday, gaining 128 yards from scrimmage and scoring two TDs. Unfortunately, he left the game with a foot injury in the fourth quarter. Kyle Shanahan told reporters after the game that the RB would undergo more testing on Monday, so the severity is not 100 percent clear as of this writing. The 49ers have a short week, with the Rams visiting on Thursday night, which doesn’t leave the rookie back much time to recover. Taylor, called up from the practice squad last week, had seven carries for 25 yards and a late TD in Week 14. Keep an eye on Guerendo’s status. If he plays, Guerendo is the only San Francisco back to start in fantasy leagues — but it could be Taylor’s turn to watch his rostered rate skyrocket this week. Taylor doesn’t have the speed or wiggle of Guerendo, but he’s a big, powerful back, and the Rams have been one of the friendlier defenses to fantasy RBs this season.