Mac Jones Injury: Day-to-day due to knee contusion

Coach Kyle Shanahan said Monday that Jones suffered a bruised knee during Sunday's 26-15 loss at Houston and is "day-to-day," David Lombardi of SFStandard.com reports.

At the same time, Shanahan relayed to Nick Wagoner of ESPN.com that he doesn't "think it's a long shot" for No. 1 QB Brock Purdy (toe) to return to action this coming Sunday at the Giants. As such, the signal-caller situation in San Francisco will be watched closely as the week goes on. In Week 8, Jones fell shy of 200 yards passing for a second straight game, but he tossed two touchdowns versus one interception and rushed twice for 23 yards. Undrafted rookie Adrian Martinez is third on the depth chart for the Niners should the unthinkable happen, and both Purdy and Jones are declared unavailable for Week 9.