The Opener: Mariners, Henderson, Minor Leagues
Briefly

The article discusses key developments in Major League Baseball as the 2025 regular season continues. The Mariners are set to activate pitcher Luis F. Castillo, requiring them to clear a spot in their 40-man roster through a player designation. Additionally, the Orioles anticipate the return of infielder Gunnar Henderson, who had an outstanding performance last season and his activation is expected to significantly enhance the team's offense after a rough start to their season.
"In order to make way for that quirky bit of trivia, Seattle will need to clear a 40-man roster spot. The Mariners will likely need to designate one of their players for assignment."
"The return of Henderson after a year where he broke out to the tune of a .281/.364/.529 slash line should go a long way to improving the club's offense."
Read at MLB Trade Rumors
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