49ers QB Brock Purdy suffered an oblique injury during Sunday's win over the Bucs, HC Kyle Shanahan said afterward. It didn't knock Purdy out of that one, but Shanahan wouldn't guarantee that Purdy will be able to play vs. the Seahawks on Thursday night. He's scheduled for additional testing on Monday, so we should learn more then. QB Josh Johnson would be next up for San Francisco if Purdy misses time.