Early 2026 returns favor Astros in Varsho-Arrighetti swap with Blue Jays

Since the deal, Spencer Arrighetti's ERA has ballooned in Toronto while Daulton Varsho's bat has cooled in Houston, though a model reading his slump as bad luck suggests his production may rebound.

Published: September 13, 2026 · Figures as of September 13, 2026

Asked: Was the Dalton Varsho trade for Spencer Arrighetti was a good one for the Jays?

Early returns favor Houston: Arrighetti's ERA nearly doubled in Toronto while Varsho cooled off but is flagged as unlucky

Reading this as a straight Varsho-for-Arrighetti swap (there's no recorded trade transaction in our data confirming the exact terms — I'm inferring it from each player's team-stint timing, which lines up with Varsho leaving Toronto for Houston on August 2-3 and Arrighetti moving from Houston to Toronto between July 24 and August 21). On the numbers available so far, it's been a rough return for the Jays: Spencer Arrighetti's ERA jumped from 4.60 with Houston to 6.87 in his five Toronto outings, well worse than the 4.19 league ERA this season, while Daulton Varsho's bat also fell off with his new club — though the team's own model reads that dip as largely bad luck rather than decline.

Spencer Arrighetti (Houston → Toronto)

Daulton Varsho (Toronto → Houston)

A few things cut against reading this as settled:

• Both samples are tiny. Arrighetti has thrown 18⅓ innings in Toronto colors (five outings, two starts); Varsho has 35 games with Houston. Neither is enough to call a real skill change.
• The sustainability read on Varsho says his slump is mostly bad luck, not decline. As of September 12, his BABIP over his last-40-team-games window sits at .221 against his own established .284 baseline — a gap the model flags as nearly two standard deviations below where his process says it should be (sustainability score 0.001, confidence 0.65, direction "up" — meaning it expects his results to recover toward his baseline, not keep sliding). The companion scoring-shift read projects roughly +1.9 runs of production per 100 plate appearances for the rest of the season, a modest expected rebound.
• There's no equivalent fresh read on Arrighetti. The last stored sustainability score for him is from July 15 — before the trade — so nothing in our models has evaluated whether his rough Toronto stretch is process-driven or just a bad small sample. That's a real gap in what we can say about him specifically as a Blue Jay.
• Season-long, the value gap is real. Over the whole 2026 season (both clubs combined), Varsho is worth 0.88 bWAR to Arrighetti's 0.12 — replacement level for the pitcher against a solidly-useful bat, even before isolating what either produced specifically in his new uniform.
• Stakes are limited either way. Toronto sits 73-75, 15.5 games back in the American League and in the AL East, well outside 2026 playoff position, so this trade reads as roster management rather than a difference-maker for this year's race.

Bottom line: on what's actually happened since the move, Toronto's return has underperformed what it gave up, but the sample is short and the one model read available (on Varsho) suggests his side of the ledger should look better by season's end than it does right now. Confidence: Low — small samples on both sides, no current model read on Arrighetti's Toronto work, and no confirmed transaction record to pin down what else may have changed hands.