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When you think about the Red Sox as a team, as a collection players, as a drama, you have to think about Triston Casas. In the story of Tristan and Iseult, the knight, Tristan, is on a quest to bring the princess, Iseult, from Ireland to England to marry the king of Cornwall, his uncle. The tale, dating back centuries, is set even further in the past: Arthurian times. They eventually fall in love but, crucially, never marry and the two die apart. So too, in a way, have Triston Casas and the Red Sox.
In 2023, Casas, who made his MLB debut the prior season, was something of a revelation at first base. Over 132 games Casas hit .263/.367/.490 with 24 home runs. That’s an .856 OPS and 2.2 bWAR and earned him a 3rd place finish in the AL Rookie of the Year race. When you look at FanGraphs’ 2026 home run projections for Boston, that 24 seems mighty nice to think about. Of course, part of the reason he only hit 24 was that he ended the season on September 14th due to injury.
Casas took a bit of a step back in 2024. In his sophomore season, the first baseman slashed .241/.337/.462 With 13 homers. His season lasted just 63 games after another injury. I don’t know whether it’s proper to use “fluke” for this type of injury (tearing rib cartilage), but swinging so hard your body tears itself apart isn’t great. Hopefully with the swing mechanics team and training regimens this isn’t something that happens again.
In 2025 there wasn’t much to write home about at all. In just 32 games Casas hit (if you can call it that) .182/.277/.303 with 3 home runs. It was an absolutely dreadful start before another season-ending injury, thsi time rupturing his patella. What’s worse is that he was starting to have a better run: in his last 9 games of the season he was hitting .222/.364/.444 with 2 home runs, 5 walks, and 7 strikeouts. There might have been a turnaround in May that we were robbed from experiencing.
Over three seasons Casas went from 132, to 63, to 32 games played. He went from a home run every 5.5 games, to every 4.8 games, to every 10.6 games (that one barely means anything with only 1 homer in his first 23 games).
After the season, Craig Breslow wouldn’t commit to Casas as his first baseman. He spoke of acquiring multiple bats to upgrade the offense and the biggest, most notable bat acquired was Willson Contreras who plays first base. Casas is in his age-26 season, he’s played under a hundred games in two years, and he was coming off a devastating injury as Spring Training kicked off. In addition to having to battle for playing time he’s battling his own body.
His most notable moment since 2023 is the legendary interview in which he turned the tables on ESPN with a mid-game filibuster on Father’s Day 2024.
He’s just weird sometimes.
Alex Speier reported that Casas was taking some ground balls at third base in camp to help Isiah Kiner-Falefa get in some time at first.
Obviously the Sox aren’t carrying Casas as a backup first baseman (that’s IKF, Romy, etc.). Which sends him, most likely, to the minors. Until and unless Masataka Yoshida can’t hit well enough as the DH or something happens to Contreras. Or he’s traded.
But either way, the Red Sox Triston, like the Tristan of old, wants to be with the team he loves. And it just hasn’t worked out.