MLB: Jeff Zimmerman on Starter/Reliever Splits

MLB: Jeff Zimmerman on Starter/Reliever Splits

I cringe every time Carlos Hernandez is brought up in conversation. He was a serviceable pitcher with a 3.68 ERA, 1.28 WHIP and 7.8 K/9. The deal is that there were two separate sides to this profile. 

In the 13 games in which he pitched in relief, he posted a 11.9 K/9 while that number dropped to 5.9 K/9 in his 11 starts. His fastball velocity started out at 98 mph. While he was able to maintain it for a bit, it dropped to 96.6 mph over his last four starts. Also, he couldn't maintain his production the second time through the order with a 2.96 FIP the first time through and a 5.75 FIP the second time. Simply, he had a 5 K-BB% as a starter. Dallas Keuchel was the only qualified pitcher to have anything close to a 5 K-BB% (next closest was Cole Irvin at 11%). If the innings threshold is dropped to 100 IP, some comparables are John Gant, Jose Urena, Jon Lester, Zach Davies.

My goal is not to beat up on Carlos Hernandez, but he's an example of a 2021 pitcher who had two different starter and reliever profiles. Today, I'm going to dig into several more of these arms who transitioned from starter to reliever.

In all, there were 65 pitchers who started five games and relieved in five games in 2021.

 As Starter    As Reliever    
NameGIP
Want to Read More?
Subscribe to RotoWire to see the full article.

We reserve some of our best content for our paid subscribers. Plus, if you choose to subscribe you can discuss this article with the author and the rest of the RotoWire community.

Get Instant Access To This Article Get Access To This Article
RotoWire Community
Join Our Subscriber-Only MLB Chat
Chat with our writers and other RotoWire MLB fans for all the pre-game info and in-game banter.
Join The Discussion
ABOUT THE AUTHOR
Jeff Zimmerman
Zimmerman writes analytics-focused baseball and football articles for RotoWire. He is a three-time FSWA award winner, including the Football Writer of the Year and Best Football Print Article awards in 2016. The 2017 Tout Wars Mixed Auction champion and 2016 Tout Wars Head-to-Head champ, Zimmerman also contributes to FanGraphs.com, BaseballHQ and Baseball America.
Bernie on the Scene: Young NL Fantasy Baseball Targets for 2022
Bernie on the Scene: Young NL Fantasy Baseball Targets for 2022
Bernie on the Scene: My MLB Offseason Power Rankings
Bernie on the Scene: My MLB Offseason Power Rankings
The Z Files: Difficult Pitching Projections, Part Two
The Z Files: Difficult Pitching Projections, Part Two
Bernie on the Scene: My All-AFL Team
Bernie on the Scene: My All-AFL Team