SEATTLE — As far as first impressions go, the Raiders have work to do.

They were badly outplayed by the Seattle Seahawks in the first half of their preseason opener Thursday at Lumen Field.

The Raiders briefly played their starters, mostly against the Seahawks’ backups. They still struggled in coach Pete Carroll’s first game. Seattle scored on three of its five possessions in the first half, while the Raiders sabotaged themselves with five penalties and two turnovers.

Things improved in the second half and the team went on to force a 23-23 tie. Kicker Daniel Carlson even had a chance to win the game with a 55-yard field goal as time expired, but his kick was blocked.

Here are three takeaways from the Raiders’ first of three preseason games:

1. Sloppy start on offense

Quarterback Geno

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