The San Francisco 49ers will host the San Diego Chargers in the final week of the preseason on Thursday night. Week 4 will see all NFL teams in action tonight, and although most starters will remain mostly on the sidelines, fans can expect competitive games as backups and rookies look to secure spots on the roster lists scheduled to be confirmed this weekend. The game between the 49ers and Chargers has a scheduled start time of 10 p.m. ET and can be watched online through live stream via the link below.

Tonight's game at Levi's Stadium will see coaches look to decide who makes the cut and who will be discarded when the roster lists are reduced from 75 to 53 this weekend. That means literally dozens of players' careers are set to either take a bump or a slump through their performances tonight.

The 49ers come into today's game after a 19-12 loss to the Denver Broncos in Week 3. Despite the loss the San Francisco secondary showed some areas of progress from previous weeks and linebacker NaVorro Bowman stood out as one of the top performers in the game. However, 49ers' coaches and fans will still be worried about their lackluster offense that remains a little toothless at the moment.

The 49ers offense has managed just one touchdown through the preseason, and they simply have not clicked together as well as many would have liked. Time is now running out for them and they will want to spend the next 10 days before the regular season starts to work things out.

Week 3 was probably a more accurate assessment of where each team lies in their preparations for the new season, as most teams played a majority of their starters for half a game or more last week.

In Week 3, the New England Patriots managed to claim a 17-16 win over the Carolina Panthers, and they also received some good news this week with a court overruling the four game ban on quarterback Tom Brady.

In other games on Friday the Kansas City Chiefs continued to look impressive in their preseason warm-ups. The Chiefs claimed a very convincing 34-10 victory over the Tennessee Titans, and their preseason form will give them hope that they can make a significant impact in the new season.

Meanwhile, the Detroit Lions looked far from their best, but still saw off a Jacksonville Jaguars team that looks like it is on the way up, but still a few seasons away from being able to seriously compete for postseason spots. The Lions came away from Jacksonville with a 22-17 victory.

On Saturday last week, the Buffalo Bills stormed to a massive 43-19 win over the Pittsburgh Steelers, and the New York Jets were able to claim a 28-18 win over city rivals, the New York Giants.

In a low scoring game the Miami Dolphins claimed a 13-9 win over the Atlanta Falcons, and the Minnesota Vikings gained a win over the Dallas Cowboys by a score of 28-14.

The Cleveland Browns looked good in their Week 3 outing, defeating the Tampa Bay Buccaneers 31-7, where as the Washington Redskins also piled on the points in a 31-13 win over the Baltimore Ravens.

The Chicago Bears were unable to hold their own against the Cincinnati Bengals, losing 21-10, where as the Philadelphia Eagles and Green Bay Packers played out the highest scoring game of Week 3, with the Eagles coming out on top 39-26.

The Indianapolis Colts defeated the St Louis Rams 24-10, where as the Seattle Seahawks claimed a tight win 16-15 victory over the San Diego Chargers, and the Denver Broncos gained a 19-12 win over the San Francisco 49ers.

On Sunday in Week 3, there were two more games, and the Houston Texans won 27-13 over the New Orleans Saints, and the Arizona Cardinals defeated the Oakland Raiders 30-23.

Today's big game between the San Francisco 49ers and the San Diego Chargers has a start time of 10 p.m. ET and can be watched online through live stream by clicking here.