"Guerrero, 25, has pitched 27 1/3 innings of relief for Boston over the past two seasons. He sports a sharp 2.63 ERA in that time and sits 96.9 mph with his heater, perhaps making it a bit surprising that he went unclaimed at first glance. However, Guerrero went on the injured list with an elbow sprain back in June and never returned - though he never required any type of surgery to address the injury. The Sox moved him to the 60-day IL in August."
"Guerrero also has poor command, walking nearly 15% of his opponents against just a 17.6% strikeout rate in the majors. The hard-throwing Guerrero's minor league numbers are more alarming. He has a respectable enough 3.89 ERA in parts of three Triple-A seasons but saw that mark jump to 4.39 in 2025. He's walked or plunked an untenable 17.4% of his opponents at the top minor league level, and in 2025 walked nearly 19% of the minor league hitters he faced in 31 innings."
Luis Guerrero cleared outright waivers and was assigned to Triple-A Worcester without the ability to elect free agency, remaining as non-roster organizational depth. The 25-year-old has thrown 27 1/3 MLB relief innings over two seasons with a 2.63 ERA and a 96.9 mph fastball, but missed time with an elbow sprain and was moved to the 60-day IL. Command issues are prominent, with nearly 15% walks and a 17.6% major-league strikeout rate. Triple-A results worsened to a 4.39 ERA in 2025 with a 17.4% walked/plunked rate. He retains velocity, strikeout upside and two minor-league options but must refine control to earn a steady big-league role and will attend big-league camp if healthy.
Read at MLB Trade Rumors
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