There is a useful kind of preseason game, and then there is this one. The San Francisco 49ers are not just lining up against the Los Angeles Chargers on Thursday in their second preseason game; they are using a live setting to sort out the details that a joint practice can only sketch in broad strokes. That makes this matchup less about the scoreboard and more about evaluation, especially with several roster battles still unresolved.
Brock Purdy is one of the biggest names to watch, and he is potentially expected to play some snaps before giving way to backups. That alone gives the 49ers a chance to see how their starting quarterback handles real-game reps after an earlier week that also included a joint practice with the Chargers. For a team trying to refine its options, a short preseason run can still tell a meaningful story.
Which battles matter most
The source points to three areas that could shape the night: left guard, safety and cornerback. That is not a random list. Those are spots where the 49ers need clarity, and Thursday offers another chance to create it. The team will be watching younger players closely, because preseason games are often less about the established names and more about who can take advantage of limited snaps.
At left guard, Robert Jones and Connor Colby are among the players in the mix. On the defensive side, the safety competition has its own tension, with Malik Mustapha, Ji’Ayir Brown, Marques Sigle and Ashtyn Davis all part of the conversation. At cornerback, Jack Jones and Renardo Green are among the names worth tracking after a joint practice earlier this week exposed some issues for the secondary.
That secondary concern matters because the 49ers already had trouble there during Tuesday’s joint practice. Black returned to practice after missing two weeks with an adductor injury, and that timing adds another layer to the evaluation. He was held out in the first preseason game, while Ashtyn Davis played well, so Thursday becomes another data point rather than a final verdict.
Why this game matters
The 49ers are in a familiar preseason position: trying to balance health, rhythm and competition. Christian McCaffrey and Brock Purdy are the sort of established pieces that can shape how the offense looks, but the bigger story is how the rest of the roster fits around them. Jordan James, De’Zhaun Stribling, Mike Evans, Willis, Halton and Alfred Collins are among the younger players who give this game some of its developmental value, while CJ West is another name to monitor as the 49ers sort through the depth chart.
That is what makes Thursday useful. The first preseason game gave the 49ers a baseline. The second preseason game gives them a better sense of which players can handle more responsibility and which position groups still need work. In preseason, that is often the whole point. The Chargers are the opponent, but the real target is clarity.
So while the result will matter to a point, the more important question is whether the 49ers leave Thursday with cleaner answers than they had before. If they do, then the game will have served its purpose.
