As the New York Giants prepare for their preseason opener against the Lions, key defensive position battles are emerging, particularly at cornerback, where Cor'Dale Flott competes against Nick McCloud, and Tyler Nubin's injury has opened the door for Dane Belton. Meanwhile, the Detroit Lions face setbacks with cornerback Emmanuel Moseley suffering a torn pectoral muscle, prompting a search for his replacement among candidates like Amik Robertson and Ifeatu Melifonwu. The Lions' linebacking corps shows promise, with Alex Anzalone excelling in coverage, while rookie Jack Campbell struggles. Coach Dan Campbell is also evaluating his team's defensive depth as injuries and performance issues challenge their roster composition. The competition for starting roles is intensifying as players like Mathieu Betts and Kyle Peko vie for spots on a restructured defense. Both teams are looking to solidify their lineups ahead of the regular season, making this preseason critical for individual performances and team strategy.