Arizona diamondbacks sign former Toronto Blue Jays pitcher

The D-backs agreed with Hatch on a minor league deal Thursday, and he'll be in big league camp as a non roster invitee.

This is the kind of quiet move teams make after an 80 and 82 season, when you've got a real rotation but you also remember how fast arms disappear.

Right now Arizona's projected starters look pretty set with Eduardo Rodriguez, Merrill Kelly, Brandon Pfaadt, Michael Soroka, and Ryne Nelson, so Hatch shows up as insurance, not a headline.

He just turned 31 after the 2025 season and he has lived the swingman life, starting some, relieving more, and bouncing between the Blue Jays, Pirates, Royals, and Twins.

In five big league seasons, Hatch owns a 5.24 ERA across 103 innings, and the raw line is 51 games with 83 strikeouts. Hatch spent the first 3 season and a half seasons in the MLB with the Blue Jays before being moved to the Pirates in 2023.

The underlying shape is familiar too, because he strikes out about 18 percent of hitters, walks 10.8 percent, and keeps the ball on the ground at a 46.3 percent clip.
That's not a late inning profile, but it can absolutely play in the sixth when you're protecting the rest of the bullpen.

The more interesting part is his Triple A track record, where he's thrown exactly 334 innings with a 4.42 ERA and a much cleaner 22.3 percent strikeout rate against a 7.5 percent walk rate.

That's the difference between «emergency guy» and «actual depth,» especially if Arizona wants someone who can piggyback a young starter or soak up four innings on a rough night.

He also dipped into Japan in 2024 with Hiroshima, and while he only made five Central League appearances, he logged 20 total outings across the top team and their minor league side.

If the D-backs need a spot start in April or a multi inning bridge in May, Hatch is the type of arm you stash in Reno and call when the schedule gets loud.

Minor league deals rarely feel exciting, but the good ones keep your season from spiraling the first time your rotation hits a pothole.

Source: MLB Trade Rumors
Diamondbacks, Thomas Hatch Agree To Minor League Deal

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