Blue Jays prospect’s profile points to power-driven upside

Power has never been the question with Sean Keys. The corner infielder swings from the left side and brings eye-popping raw power. The bigger question, though, is how the rest of his profile will develop around it.

After hitting 19 home runs in Vancouver last year despite a .217 batting average, Keys has carried that same raw power into 2026. He proved it in a big way during a recent doubleheader, going 6-for-9 with two home runs, two doubles, and seven RBI on the day. The power and the potential are real, and if Keys can sharpen some other aspects of his game to match that thump in his bat, he'll be a very interesting name to follow for years to come.

Power, patience, and projection make this a bat worth watching in High-A Vancouver

The 22-year-old was selected in the fourth round of the 2024 MLB Draft and signed for $569,700, as his knack for crushing homers was clear from the jump. After being selected out of Bucknell University (where he put up video game numbers, slashing .405/.535/.798, his first professional season in Dunedin was a solid one, putting up an .829 OPS while driving in 20 runs over 22 games.

After quickly getting promoted to High-A Vancouver, he showed a gap in hitting for average, as mentioned previously, with his .217 batting average. During those 119 games, he also hit for a .773 OPS. That season shouldn’t be defined by his numbers, though, as his exit velocity and underlying numbers climbed significantly.

Fast forward to 2026, and Keys found himself in Spring Training as a non-roster invitee. In the first game, he demolished a two-run homer to right field off Nolan Hoffman while displaying effortless power. The missile shot off his bat at 100 mph while travelling 358 feet. As for the remainder of his Spring, he collected six hits and five walks across 19 games, good for a .194 batting average.

So far this year in Double-A New Hampshire, he's slashing .325/.449/.700 with a 1.149 OPS and four dingers, powered from his six-foot-one, 232-pound frame. Keys’ underlying approach helps explain why the power plays and why the upside is there. Despite the low batting average in the larger sample size of 2025, he maintained a steady contact profile, posting a 78% overall contact rate and 85% in-zone, which has kept his strikeout rate at a reasonable 22%. He pairs that with advanced plate discipline, chasing just 17% of the time and drawing walks at a 16.3% rate, allowing him to still produce a strong on-base profile.

Aside from the bat, the 17th-ranked prospect in the system could still use some development. Keys is a slow runner, graded as a 40 on the 20-80 scouting scale. At third base, his glove and arm are still a work in progress, so his size and below-average athleticism may lead him to first base down the road. The Toronto Blue Jays are betting on the bat to carry him through the system, with some smoke and mirrors surrounding the other parts of his game.

He's now adjusted to the grind of a full pro season, so his adjustments for 2026 will be an interesting story to follow. If he keeps on displaying the power, he’ll keep his prospect buzz alive and well.

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