The Kansas City Royals’ bullpen has been a mess in 2026, and that reality is opening the door for a new name to watch heading into next season: L.P. Langevin.
Langevin, a 2024 draft pick at No. 105 out of UL-Lafayette, is still working in High-A, but the River Bandits right-hander is putting together a season that demands attention. The Royals liked him for the same reason he was so hard to deal with in college - the fastball, the slider, and the strikeout stuff. At UL-Lafayette, he posted a 39.1% K-rate and 15.22 K/9, while also showing he could handle multiple innings out of the bullpen.
That profile has carried over in a big way. Langevin’s fastball is the engine here.
He sits in the mid 90s and can reach the upper 90s, and according to MLB prospect rankings, it grades as a 70, described as the “star of the show” and “one of the most intriguing in the minor leagues.” The pitch has a ton of spin, which helps it play with run and ride and makes life miserable for hitters.
He backs it up with a slider that has a chance to become an above-average pitch.
The strikeout production has been ridiculous. Langevin is punching out batters 45.1% of the time, and in 54.1 innings in 2026, he has piled up 105 strikeouts.
Across all Major and Minor League K-rates, that places him second in baseball behind Mason Miller. At High-A, he also leads the league in whiff rate at 46.1%, CSW% at 37.3%, and Z-contact% at 58.8%.
He’s also shown some bullpen flexibility. In 11 of his 39 appearances, Langevin has worked two innings, which only adds to the appeal for a team that may need new arms in the mix soon.
But the profile comes with the usual power-pitcher problems, and Langevin has plenty of them. He is in the zone just 44.9% of the time, and his walk rate sits at 16.7%.
Batters aren’t chasing enough either, with a swing rate of 40.7% against him. He has also allowed a 1.33 HR/9, the first home runs of his pro career.
That’s the balancing act with Langevin: massive bat-missing ability, but enough control issues to make the next step tricky. The stuff is obvious. The question is whether the command can catch up.
His current major league ETA sits in the 2027-2028 range, and the Royals’ bullpen situation could make him even more interesting. The biggest concerns are his control and whether he has a plus secondary pitch, but with Kansas City looking to remake the relief corps heading into 2027, Langevin could be a name to surface in Spring Training next season as a non-roster invitee.
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