The San Francisco 49ers and kicker Robbie Gould agreed to a four-year contract ahead of Monday's deadline for franchise-tagged players to reach long-term deals.

It's a two-year, $10.5-million, fully guaranteed extension that includes an option clause that can extend his deal to four years and $19 million, $15 million of which would be guaranteed, sources told ESPN's Adam Schefter.

The 36-year-old will be entering his 15th season and his third straight in San Francisco.

Under the four-year deal, Gould's annual average of $4.75 million would make him the NFL's second-highest-paid kicker, behind only the Baltimore Ravens' Justin Tucker.

The 36-year-old converted 33 of his 34 field-goal attempts this past season, with his longest make coming from 53 yards.