Note to Yankees: Another elite starter has hit the open market.

Stephen Strasburg opted out of the final four years of his contract with the Washington Nationals, three days after the star pitcher was chosen MVP of the World Series.

The move Saturday makes the 31-year-old right-hander a free agent. Strasburg — who was one of the stars in the Nationals celebration parade earier in the day — gave up $100 million he had been guaranteed from 2020-23 as part of a $175 million, seven-year contract he agreed to with the Washington in May 2016.

Though Strasburg still could re-sign with the Nationals, the right-hander also could be a fit for the Yankees.

Hal Steinbrenner recently told The Post he was willing to consider handing out a deal worth over $200 million this offseason, but would not comment on any prospective free agents.

The owner also said on Thursday that the Yankees, who just gave closer Aroldis Chapman a contract extension, have a “very good rotation” moving forward.

“If the 2020 season was to start tomorrow, I would feel considerably more confident than I did a year ago at this time,’’ Steinbrenner said. “We will have both Severino and Montgomery back. We now know that [Domingo] German can pitch effectively at this level. And we know [James] Paxton can be the guy that we were hoping for when we made that trade. We have [Masahiro] Tanaka, [J.A.] Happ, [Jonathan] Loaisiga, and perhaps [Deivi] Garcia at some point. A very good rotation.’’

Despite Steinbrenner’s professed happiness with the rotation, Strasburg is a bonafide ace and would be a clear upgrade for the Yankees.

He was 18-6 with a 3.32 ERA this season, topping 30 starts for the second time in his career and leading the NL with 209 innings pitched.

Strasburg also has proven to be a “Mr. October” in his own right, which could be attractive to a Yankees team that hasn’t won a World Series since 2009.

During this Nationals World Series run, Strasburg went 5-0 with a 1.98 ERA in five postseason starts and one relief appearance, including wins in Games 2 and 6 against Houston. Washington also won Game 7 to claim the first championship in franchise history.

Because of his injury history Strasburg is not expected to command as much as Gerrit Cole. Nevertheless, he has put up strong numbers since his career was interrupted by Tommy John surgery shortly after his impressive major league debut in 2010. Since that time, Srasburg is 112-58 with a 3.17 ERA and 1,695 strikeouts in parts of 10 seasons.

Strasburg and Cole join a free agent market that includes several other accomplished starting pitchers, such Hyun-Jin Ryu, Zack Wheeler, Madison Bumgarner, Rick Porcello, Cole Hamels, Jake Odorizzi and Dallas Keuchel.

Cole, like Strasburg, is represented by Scott Boras. He is expected to get a record contract for a pitcher, topping David Price’s $217 million, seven-year deal with Boston before the 2016 season and Justin Verlander’s $31.33 million average salary under a three-year deal with the Astros that started in 2019.

Strasburg, two years older than Cole, likely would command a lower price because of age and durability. He was on the disabled list during seven of his 10 seasons, all but 2012, 2014 and this year.

— Dan Martin contributed to this report