Alex Smith trade becomes official as Chiefs, 49ers confirm deal - Arrowhead Pride
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NFL: Kansas City Chiefs make trade for San Francisco 49ers quarterback Alex Smith, NFL News
AP Sources: Alex Smith joining the NFC East after trade to Redskins Southwest News - Bally Sports
AP Source: 49ers trade quarterback Trey Lance to Cowboys
49ers Reportedly Sending Alex Smith to Chiefs - The New York Times
Alex Smith trade may be template for 49ers landing Jimmy Garoppolo