Michael Dalton


OSC Law attorney Michael Dalton

Michael Dalton


OSC Law attorney Michael Dalton

Email: dalton@osclaw.com
Office Phone: 314-696-0685
Cell Phone: 636-734-1012


Throughout his career, Michael Dalton has devoted 100% of his work to fighting on behalf of injury victims and has collected tens of millions in settlements and judgments on behalf of victims and their families.

A Missouri native, Michael attended the University of Missouri-Columbia for undergrad and law school. At Mizzou, Michael earned a bachelor’s degree in Political Science and a minor in English. He continued his education at Mizzou Law and was a writer for the Journal of Dispute Resolution. After law school, Michael went on to the University of Missouri-St. Louis (UMSL) where he earned a Bachelor of Science degree in Chemistry.

Prior to graduating from UMSL, Michael started clerking for a small personal injury firm in St. Louis and quickly fell in love with his newfound ability to obtain justice for those who have been injured. Within a few weeks, Michael took a job full time fighting on behalf of those hurt by the negligence of others, shifting his focus from patent law to personal injury. As an associate at this well-respected St. Louis law firm specializing in car, motorcycle and truck accident litigation, Michael perfected the skills necessary to be a top litigator and continued to concentrate his career on helping injury victims.

Michael would later become a partner at another well respected St. Louis law firm where he continued to focus his practice on a wide variety of serious personal injury claims involving wrongful death, catastrophic injury, products liability and mass torts. At this firm, Michael started to use his technical chemistry knowledge to pursue litigations against the manufacturers of dangerous products and pharmaceuticals.

In September of 2017, Michael and five other attorneys left their former firm and started O’Leary, Shelton, Corrigan, Peterson, Dalton & Quillin, LLC to continue their well-established tradition and goal of helping those injured from dangerous products or the actions of others.


National Trial Lawyers Association
American Bar Association
Missouri Bar Association
Missouri Association of Trial Attorneys
Bar Association of St. Louis


Michael’s dedication has secured millions of dollars in verdicts and settlements for his clients through the years:

$4,300,000 – wrongful death/tractor trailer
$3,000,000 – product liability/wrongful death
$1,200,000 – dram shop
$1,000,000 – tractor trailer crash


Michael was recognized as a Top 40 Under 40 Trial Lawyer by the National Trial Lawyers Association when he was only 30 years old and has also been inducted into the National Trial Lawyers Association as a Top 100 Trial Lawyer.

He is featured as a “Rising Star” by Super Lawyers (awarded to less than 2.5% of attorneys) and was named one of the Missouri’s Up and Coming Lawyers by Missouri Lawyers Weekly.

Martindale-Hubbell also awarded Michael Dalton with an AV-Preeminent Rating: an honor bestowed upon less than 10% of practicing attorneys in the country.

A more complete list of awards include:
Top 100 Trial Attorney-National Trial Lawyers Association
Up & Coming Missouri Lawyer-Missouri Lawyers Weekly
AV Rated Preeminent Attorney by Martindale-Hubbell
10 Rating by AVVO
Missouri and Kansas Super Lawyer-Rising
Top 40 Under 40 Trial Attorney-National Trial Lawyers Association
Avvo Client Choice Award-AVVO
Award of Merit-BAMSL Young Lawyers Division


Missouri 2008


Mass Tort News, “Traumatic Brain Injuries-A Brief Practitioner’s Guide.”  September, 30, 2020.


When Michael is not fighting for those who have been injured, he is often at home with his wife or volunteering his time with one of the several charities he supports.

Michael started the Dalton’s Kids Foundation in 2017, a non-profit 501(c)(3) foundation, which provides charity, community awareness and child advocacy for children all over St. Louis and Missouri.

Michael is an active Freemason, a member of the Benevolent and Protective Order of Elks and a purple belt in Brazilian Jiu-Jitsu.