Nationals To Promote Andrew Alvarez For MLB Debut

The Nationals are promoting left-hander Andrew Alvarez to the majors for his MLB debut tomorrow, interim manager Miguel Cairo told reporters (including MASN’s Mark Zuckerman) this afternoon. Alvarez is not yet on the 40-man roster and will need to have his contract selected before his scheduled start against the Marlins tomorrow. Alvarez’s promotion was first reported by TheNatsReport last night.

Alvarez, 26, was a 12th-round pick by the Nationals back in 2021. He’s been climbing the minor league ladder in the years since then and first reached the Triple-A level partway through the 2024 season. He made 16 starts at the level in the second half last year, but struggled a bit with a 4.58 ERA in 78 2/3 innings of work. He struck out just 17.7% of his opponents against a 9.6% walk rate, but in his second season at Triple-A this year his numbers have improved. In 25 starts at the level this year, Alvarez has pitched to a 4.10 ERA in 123 innings. His walk rate has mostly held steady at 9.8%, but his strikeout rate has jumped up to a much more respectable 21.5%.

Even with this year’s improvements, Alvarez is not looked at as much more than a back-of-the-rotation starter at the big league level. Alvarez is not ranked in the organization’s top 30 prospects by either MLB Pipeline or Baseball America, further emphasizing his somewhat limited upside. That shouldn’t be taken to mean he can’t be a useful piece at the big league level, however. He’s generated a solid 50.9% ground ball rate at Triple-A this year, and if he can continue to keep the ball on the ground without much regression in his K-BB% ratio, it’s easy to imagine him being a valuable up-and-down swing man or perhaps a number five starter for the Nationals going forward.

Looking ahead to 2026, the Nationals have a number of interesting arms capable of starting. MacKenzie Gore figures to lead the club’s staff next season, and Brad Lord is having an exciting rookie season that should earn him a rotation spot next year. Mitchell Parker and Jake Irvin pitched well last year but have looked more like back-of-the-rotation arms this year, while Josiah Gray and DJ Herz could also impact the rotation next year depending on how they look after returning from Tommy John surgery. Cade Cavalli could also impact the club given his former top prospect status, though his five starts in the majors this year haven’t exactly impressed.

With so many young pitchers jockeying for position in the club’s rotation mix headed into next year, Alvarez could have a real opportunity down the stretch this season to put himself into that conversation headed into Spring Training 2026 if he manages to impress throughout this September call-up. His first test will come tomorrow against a young Marlins club that has impressed this year, though injuries to players like Griffin Conine and Kyle Stowers have taken some of the teeth out of the club’s lineup.