Former Padres, Marlins Reliever Impresses Red Sox in Spring Training

The 6-foot-8 right-hander can reach over 100 mph with his fastball.

Published on Mar. 9, 2026

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Tayron Guerrero, a 35-year-old Colombian right-handed reliever with 106 innings of MLB experience, is trying to impress the Boston Red Sox as a non-roster invitee this spring training. Guerrero, who last pitched in the majors with the Miami Marlins in 2019, has a fastball that averages nearly 100 mph and has topped out at 100.6 mph this spring.

Why it matters

The Red Sox are always looking to add pitching depth, especially during spring training when they can evaluate lesser-known arms. Guerrero's elite velocity could earn him a spot in the Red Sox bullpen or at their Triple-A affiliate in Worcester if he continues to perform well.

The details

Guerrero has pitched all over the world since his last MLB appearance, including stints in Mexico and Japan's Nippon Professional Baseball league. The Red Sox are intrigued by his power fastball and the potential impact he could have in low-leverage situations out of the bullpen.

  • Guerrero made his MLB debut with the San Diego Padres in 2016.
  • He spent the 2018-19 seasons with the Miami Marlins.
  • Guerrero pitched 19.2 innings for the Chiba Lotte Marines in Japan's NPB league in 2022.
  • Guerrero is currently in Red Sox spring training as a non-roster invitee in 2023.

The players

Tayron Guerrero

A 35-year-old Colombian right-handed reliever with 106 innings of MLB experience, mostly with the Miami Marlins from 2018-19.

Alex Cora

The manager of the Boston Red Sox.

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What they’re saying

“His elite extension, thanks to his massive frame, makes his 98 mph average fastball appear even faster...He topped out at 100.6 mph this spring and, if he maintains form, could be a strong arm in Triple-A Worcester whom the Red Sox call up at some point this season.”

— Jen McCaffrey, Reporter (The Athletic)

What’s next

The Red Sox will continue to evaluate Guerrero throughout spring training to determine if he deserves a spot on the major league roster or in the Triple-A Worcester bullpen to start the 2023 season.

The takeaway

The Red Sox are always on the lookout for pitching depth, and Tayron Guerrero's elite velocity could earn him an opportunity with the big league club or their top minor league affiliate if he continues to impress during spring training.