Rookie quarterback Jaxson Dart impressed in pre-season and shone again in his New York Giants debut as he helped them defeat the previously unbeaten Los Angeles Chargers when replacing Russell Wilson.The Giants are the first 0-3 team to beat a 3-0 side in 17 years, while Dart is the first rookie quarterback to beat a 3-0 side or better on his debut for over two decades.Dart threw for a touchdown and scored another himself, but celebrations in the Big Apple were muted as superstar receiver Malik Nabers was carted off with what looked to be a serious injury.The Jacksonville Jaguars' defence is a menace this season, as they notched up another four turnovers in an impressive 26-21 win at the San Francisco 49ers.The Jags also scored a touchdown on a punt return to more than make up for Trevor Lawrence and the offence still not firing - but it's the dangerous and opportunistic defence that NFL offences will have to start planning for.With at least three turnovers in every game so far, Jacksonville already have more than they mustered the whole of last season as they move to 3-1.The blunder of the night came from Indianapolis Colts receiver Adonai Mitchell, who was racing into the end zone for a 76-yard touchdown but fumbled the ball right on the line.Stretching his arm out with the ball in celebration, it popped loose just at the wrong time and cost the Colts seven points - and ultimately their first defeat of the season as the Los Angeles Rams scored two late touchdowns in a 27-20 victory.Another statement win came from the Detroit Lions, who dismantled Cleveland's stingy defence late on to run away with a 34-10 success and third win in a row.Las Vegas Raiders rookie Ashton Jeanty scored a hat-trick in a breakout game, but a blocked field goal saw them lose to the Chicago Bears, while the Houston Texans shut out the woeful Tennessee Titans and Atlanta Falcons edged out Washington.