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About me

Mr. Mason has been practicing law since 1990 with McCormick Barstow, handling a wide variety of civil litigation. Mr. Mason has tried 20 cases to jury verdict. These jury trials included an alleged chromated copper arsenate exposure at a groundwater remediation site, aerially applied chemical drift cases, a wrongful death drowning case, two wrongful death motorcycle cases, and premises liability, automotive liability and general negligence cases. He has defended a judge in a proceeding before the Commission on Judicial Performance of the State of California. He has also tried court trials on insurance bad faith claims and commercial breach of contract claims. He has represented clients in major litigation matters, such as a 450 plaintiff mass toxic tort claim arising out of alleged metam sodium exposure; toxic tort claims, to include exposure to lead fumes, anhydrous ammonia and chlorpyrifos; conventional and organic crop damage and contamination by numerous insecticides and pesticides; complex product liability claims, to include an alleged multi-million dollar loss caused by robotic milking equipment and a wrongful death claim involving aircraft turbine engine failure; in excess of 100 wrongful death claims; quadriplegia and paraplegia claims; brain damage claims; professional errors and omissions matters; and business litigation matters, to include unfair competition and breach of contract.

Mr. Mason is admitted to practice law in the State of California, and U.S. District Court for the Eastern and Central Districts of California.

Honors and Awards

Mr. Mason is AV Rated by Martindale Hubbell.  He was selected for inclusion in the Northern California Super Lawyers list (2005, 2008-2013) for his expertise in the practice of Personal Injury Defense: General.

Professional Associations

Mr. Mason holds the rank if Associate in the American Board of Trial Advocates (ABOTA).  He is a member of the State Bar of California (Conference of Delegates of California Bar Association, Member, Sergeant-At-Arms Committee 2003-2005); member Board of Directors for the Association of Defense Counsel of Northern California and Nevada (2012-present); Fresno County Bar Association (Fresno County Young Lawyers Association-Member, Board of Directors 1994-1996; Delegate to State Bar of California Conference of Delegates 1995-2000; Member, Board of Directors 2007-2009); and Council on Litigation Management. Mr. Mason is also a Fellow of the Litigation Counsel of America.


Contact info

McCormick, Barstow, Sheppard, Wayte & Carruth LLP

5 River Park Place East
Fresno, CA, 93720

Practice areas


  1. Personal Injury: 35%
    25 years
  2. Agriculture: 30%
    25 years
  3. Defective Products: 20%
    25 years
  4. Litigation: 15%
    25 years



Hourly ($300-400/hour)

Attorney endorsements

10 total 

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  • Michael S. Waddington

    I endorse Gregory. He is a highly skilled attorney that is well respected in the legal community.


    Michael Waddington Military law Attorney
    Relationship: Fellow lawyer in community

  • William Andrew Parry

    I highly endorse this lawyer. His experience, intellect and dedication to his clients' needs is top notch. He is truly an excellent and highly respected attorney.


    William Parry Criminal defense Attorney
    Relationship: Fellow lawyer in community


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 100 Super LawyerLaw & Politics Magazine2015
Super LawyerLaw & Politics Magazine2015
Top 100 Super LawyerLaw & Politics Magazine2014
Super LawyerLaw & Politics Magazine2014
AV RatedMartindale-Hubbell2013
Super LawyerLaw & Politics Magazine2013
Super LawyerLaw & Politics Magazine2012
Northern California Super LawyerLaw & Politics Magazine2011
Northern California Super LawyerLaw & Politics Magazine2010
Norhern California Super LawyerLaw & Politics Magazine2009
FellowLitigation Counsel of America Trial Lawyer Honorary Society2008
Northern California Super LawyerLaw & Politics Magazine2008
Certificate of Special Congressional RecognitionJim Costa, Member of Congress, United States of America2006
Northern California Super LawyerLaw & Politics Magazine2005
Work experience
TitleCompany nameDuration
PartnerMcCormick, Barstow, Sheppard, Wayte & Carruth LLP1990 - Present
Association namePosition nameDuration
Association of Defense Counsel of Northern California and NevadaBoard of Directors2012 - Present
American Board of Trial AdvocatesAssociate2011 - Present
Association of Business Trial Lawyers (San Joaquin Valley Chapter)Member2010 - Present
Council on Litigation ManagementMember2009 - Present
Big Brothers Big Sisters of Central CaliforniaBoard of Directors (President, 2004-2005)2002 - Present
Association of Defense Counsel of Northern California and NevadaMember1991 - Present
Fresno County Bar AssociationMember1990 - Present
California Bar AssociationsMember1990 - Present
Fresno County Bar AssociationBoard of Directors2007 - 2009
VIP (Volunteer In Parole) MentorsAdvisory Board2005 - 2008
Conference of Delegates of California Bar AssociationsMember, Sergeant-at-Arms Committee2003 - 2005
Fresno County Bar AssociationDelegate to State Bar of California Conference of Delegates1995 - 2000
State Bar of CaliforniaMember1995 - 2000
Fresno County Young Lawyers AssociationBoard of Directors1994 - 1996
Fresno County Young Lawyers AssociationMember1990 - 1996
Legal cases
Case nameOutcome
HOULDING FARMS and FORTUNE FARMS v. GROULEFF AVIATION, INC., DON GRAGNANI FARMS and OPC FARMS, INC.Defense Verdict (Houlding – 11-1 (D) negligence, 12-0 (D) trespass; Fortune - 11-1 (D) negligence, 12-0 (D) trespass)
FERRER v. KUTZDefense Verdict (12-0 negligence for plaintiffs; 12-0 Causation for Defendants)
See all legal cases 
Publication nameTitleDate
McCormick, Barstow, Sheppard, Wayte & CarruthSummary of Tort Cases and Legislation1992
School nameMajorDegreeGraduated
University of San Diego School of LawLawJD - Juris Doctor1990
California State University, San DiegoN/ABA - Bachelor of Arts1987
Speaking engagements
Conference nameTitleDate
Thirteenth Annual McCormick, Barstow Insurance Defense SeminarSummary of Tort Cases and Legislation1992
Twelfth annual McCormick, Barstow Legal seminarHandling Claims Files in Third Party Liability Cases1991