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Last season, Willi Castro entered spring training as a non-roster invitee who had to prove he belonged on the big-league roster. The Twins had multiple injured players, and Castro performed well in the spring, with a .973 OPS while playing four different defensive positions. Entering the season, Tom Froemming crowned Castro the 2023 Sire of Fort Myers, based on his surprising spring. Castro was only 26 years old, and there was room for him to continue developing. His value to the Twins became even clearer during the regular season.
Castro proved himself integral to the Twins in the regular season, playing 124 games and accumulating the third-highest rWAR among Minnesota hitters, behind Ryan Jeffers and Max Kepler. He hit .257/.339/.411, with 32 extra-base hits and a 106 OPS+. On the bases, Castro single-handedly moved the Twins from one of baseball’s worst baserunning teams to a slightly below-average one with his 33 steals in 38 chances. His defensive flexibility also added to his value, as he played every position except for first base and catcher. The strong spring wasn't the reason why he thrived, but it did give him the opportunity to prove himself.
“We had him last year at 25 as an NRI in camp. That’s not standard practice,” Twins manager Rocco Baldelli told Twins Daily’s Nick Nelson over the weekend. “You usually don't get good athletic, switch-hitting, multi-positional guys. He did more than anyone could’ve expected him to last year."
Entering 2024, Castro wasn’t fighting for a spot on the Twins roster. Instead, he entered camp knowing he’d be used at multiple defensive positions, with a chance to improve his offensive performance. Free to focus on that aspect of things, he's hitting the snot out of the ball this spring. Three of the 21 hardest-hit balls of his entire career, in any Statcast-covered setting, have come during spring training. Entering play on Monday, Castro had a 1.000 OPS this spring, with three extra-base hits in 30 plate appearances.
“At that age, there’s still upside,” Baldelli told Nelson. “So, if he’s getting stronger still and doing things like that, that wouldn’t be surprising for a guy that's only 26 years old."
So, what’s next for Castro, and is his spring performance any indication of further development?
Projection systems view Castro as taking a step back, which can be expected when using his performance from multiple years. ZiPS projects Castro to hit .247/.306/.385, with a 93 OPS+ and a 0.7 WAR. Baseball-Reference expects .248/.312/.398, with 34 extra-base hits and 20 stolen bases over 444 plate appearances. There is regression baked into any projection system, but Castro may have started making adjustments at the end of last season.
Last September, Castro showed signs of an improved approach at the plate. Some players wear down at the season’s end, but Castro had his best month in September. In 23 games, he hit .313/.398/.550, with nine extra-base hits and four stolen bases. His OPS was nearly 100 points higher than in any other month of the season. He was also a spark plug in the lineup when the Twins were winning last season, as he posted an .852 OPS, which was 214 points higher than when he played in the team’s losses.
Other players will be impacted if Castro continues to hit well when the regular season begins. Matt Wallner has struggled this spring, going 2-for-29 (.069 BA) in 35 plate appearances. He is scheduled to be the team’s regular left fielder, but Castro can take playing time away from the left-handed slugger. Minnesota also acquired Manuel Margot to back up Byron Buxton in center field, but he, too, has been struggling this spring (.086 BA with no extra-base hits). Castro was one of the team’s center field options before they acquired Margot, and the team could turn to him if Buxton misses time.
Contending teams typically get surprise performances from different parts of the roster. Castro certainly surprised in his first year with the Twins, but his age and development might point to him being even better in 2024.
What role will Castro play this season? Should fans be excited about the way he is hitting the ball this spring? Leave a COMMENT and start the discussion.







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