Matt Sosnick is a former San Francisco-based sports agent. He attended Burlingame High School and the University of Southern California. His business partners are Paul Cobbe and Adam Karon. Their client list includes, or included at one time, Major League Baseball All-Star and 2003 Rookie of the Year Dontrelle Willis; All-Stars Josh Johnson, Jay Bruce, and Matt Moore;^{[citation needed]} Ricky Nolasco; Josh Hamilton; Freddy Sanchez; Josh Willingham; and Ryan Doumit.

Sosnick addressed the 2007 national convention of the Society for American Baseball Research in addition to many other appearances and lecture series.^{[citation needed]}

Sosnick was named one of Forbes magazine's five most influential young people in baseball in June 2008.^{[citation needed]}

His close relationship with star pitcher Dontrelle Willis helped his agency grow, as did being the subject of ESPN's Jerry Crasnick's book License to Deal.^{[citation needed]} At an earlier point in his career, Willis got Sosnick's company logo tattooed onto his pitching arm as a sign of his loyalty to Sosnick Cobbe Sports. Kyle Blanks of the Rangers,^{[citation needed]} Jason Pridie of the Athletics, and retired RHP Zach Simons also have the Sosnick Cobbe logo tattooed on their arm.^{[citation needed]}

As of 2015, Sosnick represents more than 40 Major League players, along with Randy Messenger, Wily Mo Pena, Aaron Poreda, and Kris Johnson in Japan, as well as Eric Thames, Eric Hacker, Jim Adduci, and Merrill Kelly in Korea.^{[citation needed]}

In January 2013, Sosnick was inducted into the Jewish Sports Hall of Fame along with NBA coaches Herb and Larry Brown and sportswriter Art Spander.^[1]