SEATTLE -- A Mariners team that has undergone considerable turnover in recent years made a move to secure Marco Gonzales well into the future on Monday as the club's top starting pitcher agreed to a four-year contract extension that locks him up through at least 2024.

Gonzales already was under contract for $1 million for the upcoming 2020 season and would have been arbitration eligible the following three seasons before hitting free agency in 2024. His new deal goes from 2021-24, plus a team option for '25.

Per club policy, terms of the contract were not disclosed, but MLB Network insider Jon Heyman reports that Gonzales is guaranteed $30 million in the four years from 2021-24 and could reach $45 million with the option.

Gonzales -- who turns 28 on Feb. 16 -- took over as Seattle¡¯s No. 1 starter last year and went 16-13 with a 3.99 ERA in 34 starts while throwing a career-high 203 innings.

¡°Since joining the Mariners, Marco has been a model of consistency, quietly ranking among the most productive starting pitchers in the AL,¡± Mariners general manager Jerry Dipoto said. ¡°His presence, competitiveness, preparation and leadership make him a key part of our future.¡±

The former Gonzaga University standout will finish this season in the final year of a two-year, $1.9 million deal he signed prior to the 2019 season. That contract was unusual at the time, given Gonzales wasn¡¯t slated to start his arbitration years until ¡¯21 and thus could have been paid the MLB minimum of about $555,000 in 2019 and ¡¯20.

But the Mariners came to an agreement on Gonzales¡¯ previous contract after the southpaw agreed to drop a grievance over his Major League service time that carried over from his time with the Cardinals, and now have made a move to secure him for at least four more years as well.

¡°This is truly an exciting day for me and my family,¡± Gonzales said in a statement. ¡°We consider the city of Seattle our home, and to be welcomed by the Mariner organization and the fans with such open arms, and now this contract, is a dream come true.

¡°This organization has a vision for winning a championship and I am honored to be a part of their plans. This will only further motivate me and the passion that I have to compete and win. I do not take their commitment to me lightly, and I will always represent this team and this city with honor and pride.¡±

Gonzales and Dipoto will discuss the contract further in a news conference Tuesday at 1 p.m. PT that will be streamed live on Mariners.com.

The Mariners acquired Gonzales from St. Louis in July of 2017 in a trade for outfielder Tyler O¡¯Neill. At the time of his acquisition, Gonzales was in his first season back from Tommy John surgery, and he struggled in 10 late-season outings that year.

But over the past two seasons, the 6-foot-1, 195-pounder has been the Mariners¡¯ most consistent starter while posting a 29-22 record and 3.99 ERA in 63 starts.

Gonzales is the second player the Mariners have locked up to a long-term deal this offseason, having signed first baseman Evan White -- the No. 58 overall-ranked prospect by MLB Pipeline -- to a six-year, $24 million deal in November even though he¡¯s yet to play a Major League game.