EL SEGUNDO — Now that Trevor Penning has joined the Chargers after Tuesday’s deadline day trade from the New Orleans Saints, now that he’s been assigned a locker inside the team’s training facility, now that he’s been given uniform No. 64, there are questions to be answered before he makes his debut.

Will he play Sunday?

Will he play left tackle?

Will he play right tackle?

Will he play right guard?

Coach Jim Harbaugh said Wednesday he was unsure whether Penning would play in the Chargers’ Sunday night game against the Pittsburgh Steelers at SoFi Stadium. Harbaugh also said Penning would likely play at one of the tackle positions, but he didn’t say which one.

“That’s what the week of practice will be for, to figure out exactly where Trevor fits in best,” Harbaugh said of Penning, who

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