Jon Fetterolf

As the head of ZS Sports, Jon represents players and coaches in contract negotiations, salary arbitrations, and free agency, and negotiates endorsement and marketing contracts on their behalf.  

Jon has been a certified agent since 2007, and has negotiated numerous arbitration, free-agent, and draft contracts over the last 13+ years. His clients have included All-Stars, a Cy Young Award winner, first-round selections in the MLB Draft, a major league manager, as well as two major league players who were recognized as being among the 10 smartest athletes in professional sports.

Jon also has represented players appearing before congressional committees, has represented players under investigation by Major League Baseball, and has advised amateur athletes and their families on NCAA eligibility issues. Jon also represents sports agencies, agents, and former players in a variety of litigation matters, including salary arbitration proceedings, fee disputes, and civil litigation.

Jon is a partner at Zuckerman Spaeder, and previously was a partner at the law firm of Williams & Connolly LLP . He is a former collegiate athlete, having played baseball and basketball at Haverford College, where he served as the captain of the baseball team in his senior season.

Jon frequently speaks on panels relating to baseball salary arbitration, as well as other issues regarding Major League Baseball. He regularly serves as a judge and panelist at the Tulane Law School National Baseball Arbitration Competition, and he has been a speaker at sports law events organized by Harvard Law School, Georgetown University Law Center, Northwestern Law School, University of Virginia School of Law, Fordham Law School, the Penn State Dickinson School of Law, and the University of Maryland Robert H. Smith School of Business. He also spoke as a panelist before the Knight Commission on Intercollegiate Athletics.


University of Michigan Law School, J.D., cum laude, 1999
Haverford College, B.A., 1993


Phone: (202) 778-1880

Cell: (267) 254-9612

Better service at a better price that’s tough to beat.
- Trevor Bauer, Los Angeles Dodgers

What sets us apart

Praised for creative, RECORD-BREAKING contracts

PERSONALIZED SERVICE service with industry clout

Relentless advocates for our CLIENTS’ INTERESTS

Join us on social media

ZS Sports3 months ago
Cleveland #Guardians 22-year-old LHP prospect Will Dion was named the 2022 Low-A Carolina League pitcher of the year today. He led the league in ERA 2.26, strikeouts 142, WHIP 1.03 and AVG against at .207 while with the Lynchburg Hillcats. #ForTheLand
ZS Sports4 months ago
A hard earned call up for @natemondou. Proud of you Nate! Go barrel some up!
ZS Sports4 months ago
The Hillcats had a great first half, and lost much of its pitching staff by the end of the season. One pitcher who was there until the final weeks was LHP Will Dion, who is our 2022 Single-A pitcher of the year.