St. Louis Cardinals left fielder Tyler O'Neill. Brett Davis-USA TODAY Sports

Tyler O’Neill’s status as a potential trade candidate isn’t exactly a secret. 

Heading into the winter, it’s been widely expected that the Cardinals would listen to trade offers on both O’Neill and fellow outfielder Dylan Carlson. Cardinals president of baseball operations John Mozeliak removed any doubt about the likelihood of an O’Neill trade in an appearance on MLB Network Radio on SiriusXM from this week’s Winter Meetings (video link).

“In the outfield, right now, if we were to play tomorrow it’d likely be [Lars Nootbaar], Tommy Edman and [Jordan Walker],” said Mozeliak. “Our fourth outfielder would be Dylan Carlson. Tyler O’Neill is somebody that we are listening to on trades.”

Mozeliak added that he’s received “a lot of hits” on his outfielders in general, but O’Neill was the only one he specifically highlighted as a potential trade piece. The Cards have been against moving Nootbaar for some time now, and it stands to reason that there’s similar reluctance to consider moving Walker, who entered the 2023 season as one of the game’s top-ranked prospects and posted a .291/.358/.478 slash following the trade deadline.

O’Neill, 28, has ostensibly become an odd man out. While the Cardinals could play Edman in the infield and open more playing time for O’Neill, the arrival of prospects like shortstop Masyn Winn, second baseman Nolan Gorman and utilityman Brendan Donovan have crowded the infield outlook. 

Winn, 21, didn’t hit well in last season’s MLB debut (.172/.230/.238), but that came in a sample of just 137 plate appearances — and Mozeliak specifically mentioned him in his MLB Network Radio appearance when describing his infield mix as “pretty solid” with Winn at short, Gorman/Donovan at second base and veterans Paul Goldschmidt and Nolan Arenado at the corners.

All signs seem to point to a potential trade of  O’Neill, who as recently as 2021 slashed .286/.352/.560 with 34 homers and Gold Glove defense in left field but has since mustered just a .229/.310/.397 slash in 169 games. Injuries have played a significant factor in those struggles, as O’Neill had an IL stint due to a shoulder impingement and a pair of IL stints for hamstring strains during the 2022 season. His 2023 campaign included a trip to the 60-day injured list for a lower back strain and a later return to the IL for a foot sprain.

There’s little doubt that a healthy O’Neill has game-changing power, but O’Neill simply hasn’t been healthy enough in his big league career. He played in 50 games during the shortened 2020 season and 138 games in 2021 but has otherwise rarely been on the field for the majority of a season. That 2021 campaign is the only time he’s ever reached 100 games played or reached 400 plate appearances.

O’Neill is slated to become a free agent at season’s end and is projected to earn $5.5M this coming season. The power is clearly legitimate, but he’s been a bit below average at the plate overall throughout these two most recent, injury-riddled seasons. He still grades as a plus defender in left field and is an above-average runner. As far as change-of-scenery candidates go, O’Neill is a fairly appealing one, but the litany of injuries, minimal club control and limited recent track record at the plate will all coalesce to tamp down his value in a trade.

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