Tate Southisene has looked right at home in the Arizona Fall League, and for the Braves, that’s been the latest sign that their No. 3 prospect is moving fast.
The 20-year-old has been a constant presence for the Glendale Desert Dogs, putting together a strong finish to a year that already took him from a rocky pro debut to High-A and then all the way to Double-A. Through 16 games in the desert entering the final week, Southisene was hitting .321 with a .471 on-base percentage. He had more walks, 14, than strikeouts, 12, and he’d gone a perfect 7-for-7 on stolen-base attempts.
That kind of production has matched the way he plays. MLB’s No. 58 prospect brings a jolt every time he steps on the field, whether he’s spraying the ball into the gaps, running the bases with urgency or staying locked in defensively. Off the field, teammates say he’s a different kind of presence entirely.
“He can do everything -- play defense, take his walks, steal second, third, hit a home run, hit a ball in the gap. He’s got power to all sides of the field, doesn't strike out a lot,” said Isaiah Drake (ATL No. 29), who has roomed with Southisene during the Arizona Fall League.
“But he's a great dude too, my dog.”
Southisene’s season has moved in a hurry. After a brief and uneven debut with Single-A Augusta last summer, he went back there to start 2026, earned a promotion to High-A Rome by early June and then forced his way to Double-A Columbus on July 28. That move made him the first high school player from his draft class to reach the upper Minors.
His stay there didn’t last long. After just two plate appearances, a fastball came in on his hands and broke his right wrist, ending his regular season.
With time running out to get back into Minor League games, the AFL became his chance to keep building on the year. So far, he’s made the most of it.
“He can do everything -- play defense, take his walks, steal second, third, hit a home run, hit a ball in the gap. He’s got power to all sides of the field, doesn't strike out a lot,” Drake said.
Coaches in Glendale have seen the same thing. Philip Caulfield, who also coached Southisene during his 38-game run with Rome this year, said the young infielder’s instincts stand out right away.
“I think it's a credit to his work,” Caulfield said. “His instincts are very, very good. There's some things that he does at such a young age that you watch and it's hard to go out and teach those intangibles -- he picks them up very well.
“The quality of his at-bats are outstanding, and then the quality of work he wants to put in every single day without question, without even really batting an eye at it [is impressive].”
Aaron Hill, Glendale’s hitting coach and also a hitting coach in the White Sox system during 2026, said Southisene has a habit of treating every trip to the plate like it matters.
“Phil told me early on in the season, ‘One thing about him is he never gives away at-bats,’” Hill said. “It doesn't matter what the situation is, it doesn't matter what the score of the game is, he's in every pitch.
Knowing that regardless of the outcome, regardless of the result, he's gonna give you a quality at-bat, it's great watching him. He's gonna be really good.”
That praise fits the numbers. Across his three Minor League stops this season, Southisene hit .278/.408/.467 and posted a 139 wRC+, good for second among all qualified Braves Minor Leaguers. For all the talk about his tools still being raw, he’s also done damage at the plate, with 20 of his 41 balls in play coming off the bat at 95 mph or harder and a max exit velocity of 109.7.
Caulfield said the work ethic is just as obvious as the production.
“He never hesitates to go to the cage and put extra work in,” Caulfield said of Southisene. “If it's another coach or myself, ‘Hey, Tate, we're gonna go work on this.’
I mean, he'll be beating us to the field. … He takes it upon himself.
Becoming a professional at a young age, learning to do that is probably one of the hardest parts.”
Hill said Southisene has even been thinking about adding more lift to his swing, though the message back has been simple.
“The other day he was talking about wanting to be able to pull the ball in the air more,” Hill said of Southisene. “I'm like, ‘Bro, you stick to what you're doing, use the gaps, have good direction -- you catch it out in front, it's gonna go. Just stick to what you're doing, don't change a thing.’”
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