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“I’m pretty sure his news is bigger than mine,” Knighton said, laughing. “I’m just excited about the addition and just ready to get things started.”

The loss of Welker caught some in the Boston area a little bit by surprise.

“Say it ain’t so, Wes!” Celtics coach Doc Rivers said before their game against Toronto. “He was fun to watch.”

To open free agency on Tuesday, the Broncos solidified the offensive line by bringing in guard Louis Vasquez on a four-year contract worth $23.4 million, with $13 million of that guaranteed.

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AP National Writer Eddie Pells in Denver and AP freelance writer Ken Powtak in Boston contributed.