Overview
- The Red Sox called up right‑hander Tyron Guerrero and optioned reliever Zack Kelly to Triple‑A Worcester on Friday, creating a 40‑man roster spot by moving Kutter Crawford to the 60‑day injured list.
- Guerrero, 35, dominated Triple‑A this spring and early season with a 0.92 ERA and 22 strikeouts in 19 2/3 innings while routinely reaching triple‑digit velocity and topping out at 102.5 mph.
- Kelly had been effective for Boston, posting a 1.64 ERA over his last 12 outings and a roughly 3.3 ERA overall, but he could be optioned because he still has minor‑league options.
- Interim manager Chad Tracy said the promotion was earned and noted the harsh roster reality that relievers with options often go up and down, while Guerrero cannot be sent down freely.
- The move preserves bullpen firepower now but tightens roster flexibility and sets up another decision when lefty Danny Coulombe is ready to be activated in the coming days.