49ers' 3-Game Losing Streak Continues with 31-17 Loss to Bengals; Steelers Defeated by Jaguars, Lose Quarterback and Safety; Steelers Accuse Officials of Game-changing Calls; Giants and Jets Struggle to Stay Relevant as Losses Continue; QB Cousins' Probable Achilles Tear Adds to Vikings' Woes; Bryce Young Leads Panthers to Victory Over C.J. Stroud and Texans; Bears Lose to Chargers, Indicating Talent Shortage; Washington Commanders Lose to Philadelphia Eagles Despite Sam Howell's Standout Performance; Bryce Young Steers Tennessee Titans to Victory While Kirk Cousins' Potential Achilles Tear Could Spell Disaster for Vikings.