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Peter T. Grossi

Lecturer in Law

Peter Grossi

Peter Grossi is a senior litigator and former chair of the Litigation Group at Arnold & Porter LLP.  Since 1997, he has served as National Counsel for Wyeth in its Diet Drug cases.  He obtained the first defense verdict in a Diet Drug jury trial, and thereafter tried 12 more cases to successful conclusions.  He was also the senior supervising attorney working with other teams in the other 40 cases tried to verdicts.


Prior to his work on the Diet Drug cases, he defended a number of other pharmaceutical companies, as well as those in other industries, in product cases. Each year from 2009 to 2013, Chambers USA named Mr. Grossi as the "Senior Statesman" of the national product liability bar.


Mr. Grossi is a lecturer at Harvard and the University of Virginia Law School and has taught trial practice and product liability to national meetings of the Defense Research Institute, the AEI-Brookings Judicial Education Program and the ABA Section on Arbitration and Alternative Dispute Resolution. In 2012, he recieved the Penn Law Award for Best Adjunct.


Prior to joining Arnold & Porter, he clerked for Judge J. Joseph Smith on the United States Court of Appeals for the Second Circuit.

Articles and Book Chapters

"Because I Say So," The Problem of Unsupported Anecdotal Expert Proof in Product Liability Litigation, EXPERT EVIDENCE REP. (2009) (with Barker).

Fraudulent Joinder in Pharmaceutical Cases: Time to Get Real, TOXIC L. REP., (2008) (with Miller).

Defense Interviews of Treating Physicians: A Proposal to End Plaintiffs' Misuse of a "Shield" as a Sword, EXPERT EVIDENCE REP. (2008) (with Browne).

Litigation-Driven "Medical" Screenings: Diagnoses for Dollars, PRODUCT SAFETY & LIABILITY REP., (2005) (with Duncan).

More publications can be found here.

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