Calvin Ziegler, an exciting pitching prospect, is looking at essentially a second straight lost season and will need Tommy John surgery, a source confirmed.
The righty, who is the eighth-ranked Mets pitching prospect by MLB Pipeline, pitched just one inning last season after bone spur surgery and then tearing a quad during his rehab.
Ziegler returned to the Low-A St. Lucie mound in September and struck out the three batters he faced.
He began this season with plenty of hype that accelerated after he debuted with High-A Brooklyn by throwing four perfect innings and striking out nine.
At one point, he struck out eight batters in a row.
But he lasted just two hitless innings in his second start of the season on Sunday and exited early with an injury that will mean his season again is over.
Ziegler, a 21-year-old from Kitchener, Ontario, was a second-round pick in 2021.
Metsmerized first reported he would need surgery.