The NFL preseason is officially underway following last week's Hall of Fame Game, but many teams are opting to hold their starters out, which means fans should look closely at rookie performances for insights into future fantasy value. Players like Jaxson Dart of the New York Giants, a first-round quarterback, and Nick Emmanwori from the Seattle Seahawks, showcasing defensive prowess, are expected to be key players to watch. With the potential for significant playing time in the absence of starters, these rookies could impact their respective teams and fantasy rosters this season.

For example, Dart's development will be crucial for the Giants as they navigate a season under Russell Wilson. Meanwhile, Emmanwori’s versatility in the secondary could make him a surprising steal for fantasy teams if he secures a starting role. Cleveland's Harold Fannin Jr., who was a standout tight end at Bowling Green, could also see increased responsibility in a more dynamic offensive setup. These rookies represent an exciting opportunity for fantasy managers to scout talents who might emerge as the season unfolds.