Herron’s addition raises questions about the health of backup tackle Dan Skipper, who suffered an injury in Detroit’s preseason opener against the Los Angeles Chargers. After the game, Skipper was in a boot and told reporters it was a low-ankle sprain.

The Detroit Lions open the preseason against the Los Angeles Chargers in the annual Pro Football Hall of Fame Game on Thursday night.

F ilm review sessions are always tougher after a loss, even in the preseason. Though the final score of Thursday night's Hall of Fame game against the Los Angeles Chargers doesn't matter whatsoever, the path to the Lions ' 34-7 loss does.