Second option at QB for the worst case scenario

Assuming that Watson isn’t the QB but can’t be traded due to his upcoming legal issues. What are some viable options if the Texans can’t get a guy in the draft and Taylor gets injured (as he always does)

I would think Mariotta would be a good option to trade for. Dude seems like he still has the skills to be a decent starting QB. Also worth mention is PJ Walker who was a decent backup in Carolina considering he probably got very limited snaps during the pandemic years with most of the team focus being on developing Bridgewater