By Cameron Flynn On the Wednesday leading up to Jacksonville’s Week 8 matchup in London with the Denver Broncos, the Jaguars received unfortunate injury news pertaining to a key defensive starter. As reported today by Ari Meirov, Jacksonville has placed cornerback Shaquill Griffin on injured reserve with a back issue, meaning Griffin is out for at least the team’s next four games. “The #Jaguars have placed CB Shaquill Griffin (back) on Injured Reserve, meaning he’s out at least four games,” Meirov tweeted Wednesday. Griffin, a former third-round pick of the Seahawks in 2017, has been a member …