Two Castillos:: The Mariners employ Luis Miguel Castillo, a 32-year-old three-time All-Star known as "The Rock," who started Wednesday's game.
Introducing "The Pebble":: Luis Felipe Castillo, a 30-year-old right-hander nicknamed "The Pebble," is set to make his first MLB start on Friday.
Back-to-Back:: Luis F. Castillo's start comes just two days after Luis M. Castillo pitched seven strong innings.
Historical Rarity:: This marks only the second known instance since 1900 where pitchers with the same name started back-to-back games for the same team. The first was Bobby J. Jones and Bobby M. Jones for the New York Mets in 2000.
Why This Matters:: This unique situation highlights the unpredictable nature of roster management, provides a fun piece of baseball trivia, and draws attention to Luis F. Castillo's unlikely journey back to the majors.
The familiar face is Luis Miguel Castillo, the Mariners' established ace who delivered a quality start against the Detroit Tigers on Wednesday, April 3rd, 2025. Just two days later, on Friday, April 5th, Luis Felipe Castillo took the mound against the San Francisco Giants at Oracle Park.
Luis Felipe Castillo, 30, is a journeyman who signed a minor league deal with Seattle in January 2025. His path back to MLB included spending the last two seasons (2023-2024) pitching in Japan's Nippon Professional Baseball (NPB) for Chiba Lotte and Orix. During his time in NPB, he posted a respectable 3.01 ERA with 108 strikeouts over 143.1 innings, showcasing excellent control. Before Japan, his only MLB experience consisted of three relief appearances for the Detroit Tigers in 2022.
Interestingly, the two Dominican pitchers, though unrelated, met during spring training and noted similarities in their pitching mechanics and arm angles. Luis M. Castillo even mentioned getting mistakenly tagged on social media for Luis F. Castillo's performances while the latter pitched for the Cibaoan Eagles in the Dominican Republic.
Luis F. Castillo's call-up wasn't just for the novelty. It addresses a need in the Mariners' rotation. Emerson Hancock, who initially won the fifth starter spot due to George Kirby's shoulder fatigue recovery, struggled in his season debut and was optioned to Triple-A. Rather than reshuffle the rotation completely, the Mariners opted to give Bryce Miller and Bryan Woo an extra day of rest, slotting Luis F. Castillo in for a spot start. This decision underscores the team's focus on pitcher health and managing innings early in the season. To make room on the 40-man roster, reliever Hagen Danner was designated for assignment.
This isn't the first time same-name coincidences have occurred in baseball. The Mets featured righty Bobby J. Jones and lefty Bobby M. Jones in 2000, who also made back-to-back starts (July 3-4 vs. the Marlins). Coincidentally, the Marlins' second baseman in those games was Luis (Antonio) Castillo! The Mariners themselves have another name pairing with superstar Julio Yamel Rodríguez and minor league catcher Julio Esteban Rodriguez.
Are the two Luis Castillos on the Mariners related?
No, they are not related. Both pitchers are from the Dominican Republic but share no familial connection.
How rare is it for pitchers with the same name to start consecutive games for the same team?
It's extremely rare. According to the Elias Sports Bureau, the only other confirmed instance since 1900 involved Bobby J. Jones and Bobby M. Jones for the New York Mets in 2000 (and again for the Padres in 2002).
Why is Luis F. Castillo getting a start?
He is filling the fifth spot in the rotation due to George Kirby recovering from an injury, Emerson Hancock being optioned after a poor start, and the team giving other starters like Bryce Miller and Bryan Woo extra rest.
Baseball rosters can produce fascinating coincidences like the two Luis Castillos.
Luis F. Castillo's journey highlights the perseverance required to reach or return to the Major Leagues, including stints in international leagues like NPB.
Spot starts like this demonstrate how teams manage pitching depth and navigate injuries or performance issues throughout a long season.
It's a unique opportunity for Luis F. Castillo to make his mark. How do you think "The Pebble" will perform in his first MLB start against the Giants? Let us know your thoughts!
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Source 1: Mariners set to start Luis Castillo in two straight games. ... What? target="_blank"
Source 2: Mariners pitchers, Luis M. Castillo and Luis F. Castillo, share more than a name | The Seattle Times target="_blank"
Source 3: Mariners To Select Luis F. Castillo - MLB Trade Rumors target="_blank"
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