Stefon Diggs was back in his old digs. But it wasn't home sweet home.

The former Bills star returned to Highmark Stadium on Sunday night wearing Patriots colors, and carrying four years of memories.

Diggs said it would be emotional.

It was.

"Nostalgic," Diggs told NBC sideline reporter Melissa Stark on the field prior to kickoff. "It's been a long time. Obviously I've got a lot of love and respect for this team and fan base. I'm excited. I waited all week for it."

Diggs, who signed a three-year, $63.5 million deal with the New England Patriots in March, was back under the bright lights of Sunday Night Football , the same stage where he once starred alongside Josh Allen.

Bills fans booed Diggs as he walked out of the tunnel and trotted onto the field. Diggs greeted several

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