Peter T. Grossi

  • Lecturer

Peter Grossi, who joined Arnold & Porter in 1974, is a senior litigator and former chair of the firm’s Litigation Group. For more than 25 years, he has defended pharmaceutical companies, including for 12 years as national and chief trial counsel for Wyeth in its diet drug litigations. He obtained the first defense verdict in a diet drug jury trial, and thereafter tried many more cases to successful conclusions. From 2009-16, Chambers USA has named him the "senior statesman" of the American products liability bar.

Grossi also teaches product liability courses at Harvard University, Yale University and University of Pennsylvania law schools and has lectured on various trial practice and product liability issues to national meetings of the Defense Research Institute, the AEI-Brookings Judicial Education Program and the ABA Section on Arbitration and Alternative Dispute Resolution.

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


  • J.D.
    Yale Law School
  • M.A.
  • B.A.


"'Because I Say So': The Problem of Unsupported Anecdotal Expert Proof in Product Liability Litigation," (with Holly Baker) Expert Evidence Report 9 Feb. (2009). 

"Fraudulent Joinder in Pharmaceutical Cases: Time to Get Real," (with Danielle Miller)Toxics Law Reporter 18 Dec. (2008). 

"Defense Interviews of Treating Physicians: A Proposal to End Plaintiffs' Misuse of a 'Shield' as a Sword," (with Mallori Browne) Expert Evidence Report 20 Oct. (2008).

"Litigation-Driven 'Medical' Screenings: Diagnoses for Dollars," Product Safety & Liability Reporter 17 Oct. (2005).