Johnny King may give the Blue Jays another Trey Yesavage-style upside track

The Blue Jays' High-A affiliate opened the year with a roster that includes Arjun Nimmala and King, and that alone puts real prospect heat on the Canadians.

The bigger question is whether King can become the next arm to move through that stop the way Trey Yesavage did.

That's not a lazy comp. Yesavage turned Vancouver into a launch pad in 2025, striking out 33 across 17 1/3 innings before Toronto pushed him to Double-A.

Now King is the one carrying that kind of upside into the Northwest League. MLB Pipeline lists the 19-year-old lefty as Toronto's No. 4 prospect, and that ranking tells you this is more than a normal High-A assignment.

The raw numbers back it up. In his 2025 pro debut, King posted a 2.48 ERA with 105 strikeouts in 61.2 innings between the Florida Complex League and Single-A Dunedin.

That strikeout volume is the part that jumps off the page. It's the same kind of swing-and-miss pressure that made Yesavage feel too advanced for Vancouver almost as soon as he arrived there.

King is not Yesavage, and Toronto does not need him to be a copy. But the path is sitting there in plain sight: dominate one level, force the next move, and turn Vancouver into a brief stop instead of a season-long stay.

What makes King such an easy name to circle is how young he is for this test. Toronto took him in the 3rd round of the 2024 draft and signed him for $1,247,500, betting on upside long before the stat line exploded.

There's real stuff here, not just projection. MLB Pipeline grades King's fastball at 60 and his curveball at 55, which is why the Blue Jays see him as one of the most exciting young pitchers in the system.

The risk is part of the story, too. King's walk rate sat at 5.4 BB/9 in 2025, so this season is not only about missing bats. It's about proving he can command enough of the zone to stay in a starter's track.

That's where Vancouver becomes a real checkpoint. If King throws strikes there the way Yesavage overpowered hitters there, Toronto's player-development staff is going to have a hard time leaving him in High-A for long. That is how these fast-track conversations start.

And the setting matters. Canadians manager Jose Mayorga now has one of the system's most electric young arms on a roster already carrying star power with Nimmala.

For the Blue Jays, this is bigger than a good affiliate roster.

Trey Yesavage already showed what a quick Vancouver stop can become, and Johnny King now opens 2026 with a chance to turn the same route into his own climb.