Thursday marked the deadline for the Red Sox to activate nine players from the 60-day injured list, and with only eight roster spots available the club needed to make a move to clear space.

Luis Guerrero wound up being the odd man out.

The Red Sox announced Thursday afternoon that they have designated Guerrero for assignment, potentially signaling the end of the hard-throwing right-hander’s time with the organization.

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Guerrero, 25, has appeared in 22 MLB games over two seasons and posted a 2.63 ERA over 27.1 career innings. He debuted in September of 2024 and did not allow an earned run in his first nine MLB outings, putting himself in strong position to make the Opening Day roster the following spring.

But Guerrero did not capitalize on his opportunity. The righty st

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