Connor Thomas’s 2026 season ended up split into two very different stories: a brutal, short-lived run with the Braves and a much more useful stretch with the Kansas City Royals. If you only saw him in Atlanta, you’d think the ending was ugly. If you zoom out, though, there’s at least a case that he found something as a reliever once he got out of there.
The Braves brought Thomas in on a minor league deal in early November of 2025 after he elected free agency when the Brewers outrighted him at the end of their season. Milwaukee had taken him in the Rule 5 Draft before the 2025 season, which at least hinted that there was some appeal there. But injuries wrecked that year for him, including bone spurs in his elbow, so Atlanta was taking a calculated flier.
There wasn’t much reason to expect more than depth. Thomas opened the year on the Injured List after the surgery he had the year before, then got a few High-A outings with the Rome Emperors before being activated on May 22 and assigned to the Gwinnett Stripers. He stayed there until an early-July call-up, and that was basically the role the Braves had in mind all along.
The profile backed that up. Thomas was sitting on 35+ future value grades from FanGraphs, which is firmly in fringy-prospect territory.
He was a fifth-round pick with a modest bonus, had not pitched especially well in his two 2025 appearances with Milwaukee, and had offered pretty ordinary results dating back to 2022 once he reached Triple-A full time. There were some minor league stretches where his ERA looked better than the underlying numbers, but that still left him looking more like organizational filler than someone set to carve out a major role.
For a while, his Braves stint seemed built around soaking up innings and nothing more. In his first appearance on July 7 against the Pirates, he allowed the first of the four homers he would surrender in very limited work for Atlanta and was tagged for four runs.
That set the tone for what was to come. Across his time with the Braves, he appeared in just two games and threw 6 1/3 innings.
The one thing Thomas did accomplish in Atlanta was eating innings, which matters when the bullpen is stretched thin. After both of his appearances, the next pitcher into the game was Jorge Mateo, who is not a pitcher. That says plenty about the state of those outings and the kind of emergency duty Thomas was asked to handle.
Then came the one everyone remembers. On July 27, Walt Weiss called him in for the sixth inning of a tie game against the Mets, a move that reflected just how taxed the bullpen was at that point.
Thomas immediately gave up a single and a two-run homer, and from there it unraveled fast. He faced 23 batters, gave up 10 hits, including three home runs, walked five and was charged with 11 runs over 78 pitches.
It was the kind of line that makes even the opposing TV crew sound sympathetic.
Atlanta didn’t wait long after that. Thomas was sent back to the minors two days later, and the Athletics claimed him off waivers.
What makes the whole thing a little stranger is that he was much more effective once he landed with the Royals. Over 19 1/3 innings with Kansas City, Thomas worked as a ground-ball-heavy reliever, posting a 64.4 percent ground ball rate while also keeping runs in check.
He finished with a 2.33 ERA and a 2.43 FIP across 19.1 innings and 17 appearances for the Royals. By the end of the season, he had actually put up positive fWAR overall, with -0.4 fWAR for Atlanta and +0.5 for Kansas City.
That’s why the outlook is not quite as bleak as the Atlanta cameo suggests. Thomas is a left-hander under 30, he gets ground balls at a high clip and he showed with the Royals that there may still be something usable there.
He’s never going to overwhelm anyone with velocity, but some team may decide the movement on his pitches is enough to keep betting on the ground-ball approach. The Braves probably won’t be the one to make that bet again.
Of course, Kansas City still controls him because of his low service time, so his next step depends on what they choose to do. Even with the stronger finish, he still looks like a replacement-level reliever until he proves otherwise over a longer stretch. But the Royals may have gotten him to figure something out, and that alone changes the way his 2026 season has to be viewed.
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