EL SEGUNDO — Joe Alt didn’t seem concerned about flipping sides of the offensive line when asked about it before the Chargers faced the Kansas City Chiefs last Friday night in Sao Paulo, Brazil . Alt had played left tackle at Notre Dame before switching to right tackle as an NFL rookie last season.

So, it wasn’t exactly unfamiliar territory for him.

Quarterback Justin Herbert also said he wasn’t the least bit worried about Alt shifting into the starting spot held with great distinction by Rashawn Slater for the past four seasons. Herbert knew his all-important blind-side protection was in capable hands even though Slater was sidelined by a knee injury.

Offensive coordinator Greg Roman said he had watched Alt on a video of a game last season and didn’t recognize the Chargers’ first-ro

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