Mac Jones will likely be the 49ers ' starting quarterback for Sunday's big road matchup against the Buccaneers , according to CBS Sports senior reporter Matt Zenitz , who is also reporting that Brock Purdy will reprise his role as San Francisco's QB1 when he is healthy enough to do so.

The 49ers are 3-0 this season with Jones, a former Patriots first-round pick who currently leads the NFL with an average of 301.7 passing yards per game. He's been playing in relief of Purdy, who aggravated his toe injury during the 49ers' Week 4 loss to the Jaguars . Purdy initially sustained the injury during the 49ers' Week 1 win over the Seahawks .

With Purdy out, Jones started the 49ers' following two games. He threw for 279 yards and three scores in the 49ers' Week 2 win over the Sa

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