Jonathan Mariner was recently appointed by new MLB Commissioner Rob Manfred to serve as Chief Investment Officer of Major League Baseball. In this role, he is responsible for overseeing approximately $2 billion in combined league-wide pension assets and MLB’s strategic investment funds. He also serves as President of the league’s captive insurance company, BASES, which provides property and casualty insurance coverage to all 30 teams and ballparks.
Mr. Mariner previously spent 12 years as Executive Vice President and Chief Financial Officer of Major League Baseball, where he was responsible for overseeing the League’s treasury, budgeting, financial reporting, and risk management activities. He was also tasked with overseeing all required, Club-level league financial reporting through the team CFOs.
Mr. Mariner also served on several Commissioner-appointed, League-wide committees, including those dealing with Finance and Compensation; Revenue Sharing; Long-range Planning; and MLB’s Strategic Investment Fund.
Mr. Mariner previously served as Executive Vice President and Chief Financial Officer for the Florida Marlins Baseball Club, initially under the ownership of Wayne Huizenga and, following a sale in 1999, worked under then-owner John W. Henry (now the Principal Owner of the Boston Red Sox).
Mr. Mariner also served as Vice President and Chief Financial Officer for the Florida Panthers Hockey Club during their initial start-up and 1993-94 inaugural seasons; and as Vice president and Chief Financial Officer for Sun Life Stadium, the multi-use sports complex that served as home for both the Florida Marlins and Miami Dolphins.
Mr. Mariner currently serves on the board of directors, and chairs the audit committee of FM Global Insurance, a global commercial and industrial property insurance underwriter; and Technology Frontiers, a privately held Chennai, India, based firm specializing in providing sophisticated technology solutions primarily to major sports leagues in Europe, Asia and South Africa. He also serves on a number of charitable, foundation and advisory boards, including the University of Virginia’s Darden Graduate Business School Foundation; and Little League Baseball, where he chairs the audit committee.
Mr. Mariner graduated from the University of Virginia with a B.S. degree in Accounting; received his MBA degree from the Harvard Business School; and is a former Certified Public Accountant (CPA).