Moorad began specializing in athlete representation in 1983. He concentrated on Major League Baseball and signed a number of athletes, including Will Clark and four other members of the United States national baseball team team in the 1984 Summer Olympics. In 1985 he, together with Leigh Steinberg, negotiated several contracts in both Major League Baseball and the National Football League. The two of them worked together for eighteen years and were the agents for such athletes as Steve Young, Troy Aikman, Warren Moon and Thurman Thomas. Moorad also negotiated for Manny Ramirez, Eric Karros, Ivan Rodriguez, Mo Vaughn, Shawn Green, and Raul Mondesi, among others. The deals also included No. 1 overall selections Darin Erstad (1995) and Pat Burrell (1998), both draft records at the time. 'Steinberg & Moorad' was sold in October 1999 to the Assante Corporation, a Canadian financial-management firm, for a reported $120 million.
Major League Baseball
In 2004, Moorad agreed to a proposal to become an owner and CEO of the Arizona Diamondbacks. He owned about 12 percent of the team, estimated to be worth $18 million in 2009. While with Arizona, Moorad was a General Partner, Chief Executive Officer, the spokesman for the D-backs’ ownership group, and oversaw the day-to-day operations of the franchise.
San Diego Padres
In 2009, Moorad became the lead partner in a group that agreed to buy the San Diego Padres from John Moores. Moorad and his group of 12 investors (including former Dallas Cowboys QB Troy Aikman, home builder Al Baldwin, CEO of Save Mart Supermarkets Bob Piccinini, and then-Panda Restaurant-CEO Tom Davin)  began purchase of the team with Moorad serving as club CEO and Vice-Chairman. The sale was valued at about $500 million, and the group planned to purchase 100% of the Padres over five years. In 2010, Moorad was named one of San Diego's Most Admired CEOs by the San Diego Business Journal. During this time, Moorad also purchased the Padres' minor league Triple-A team, the Portland Beavers. By 2011, Moorad had sold his 12 percent share of the Diamondbacks. In April 2012, Moorad also negotiated a new TV deal that would lead to the creation of Fox Sports San Diego, and bring in over $1.2 billion for the Padres over the next 20 years.
By January 2012, Moorad and his group held 49% ownership of the Padres when MLB deferred voting on their approval for the group to complete the sale with Moores. In March 2012, Moorad withdrew his application to complete the full purchase of the Padres. He stepped down as CEO of the Padres later that month, but remained with the team as Vice-Chairman. Some media outlets speculated that Moorad was short of the needed support of 22 MLB team owners to complete the purchase of the Padres, though only two were suspected of opposing Moorad's ownership (two would have been enough for Selig to delay voting, however, given his desire, and good record for unanimous votes by MLB owners). Moores declared that the entire team was up for sale again in April, citing the good opportunity in the market after the record $2 billion sale of the Los Angeles Dodgers; Moorad's minority group would receive 49% of the proceeds of any sale of the Padres. Moorad was succeeded by Ron Fowler as lead of the group of any owners transferring ownership to the new purchase. In August, the Padres were sold for $800 million, a $300 million increase over the valuation in the 2009 sale.
Moorad Sports Partners
In February 2015, Moorad Sports Partners, along with the Carlyle Group and RSE Ventures, acquired PrimeSport Holdings Inc., a global sports travel and events-management company. Moorad now serves as PrimeSport's Chairman.
Moorad and Steinberg both appeared in and served as technical consultants to director Cameron Crowe in the 1996 Oscar-winning picture “Jerry Maguire.” Moorad and Steinberg were the inspiration behind the Jerry Maguire character played by Tom Cruise.
Moorad formerly served on the Board of Directors for Oakley, Inc., until the sale of the company to Italian manufacturer, Luxottica. Moorad also served on the Board of Directors for Citizen Sports Network, a sports entertainment company, until its sale to Yahoo! in 2010. In 2006, Moorad ventured into the sport of NASCAR, purchasing Hall of Fame Racing from Roger Staubach and Troy Aikman.
Moorad encouraged his clients to donate millions of dollars to their own non-profit foundations and alma maters. Moorad himself endowed a $100,000 scholarship to his alma mater UCLA, where he teaches a “Business of Sports” class at UCLA’s Anderson School of Management. In February 2012, Moorad also committed $5 million to his alma mater Villanova University School of Law for the creation of The Jeffrey S. Moorad Center for the Study of Sports Law. 
After Moorad's good friend Augie Nieto (founder, Chairman and CEO of Life Fitness) was diagnosed with amyotrophic lateral sclerosis in 2005, Moorad has been active in helping to raise funds to find a cure for ALS.  Moorad serves as a Vice President of the Muscular Dystrophy Association and is on the board of the Translational Genomics Research Institute (TGen), both of which Moorad has helped link to Augie's Quest.
He has also been very active in the California Coast and Arizona Chapters of the Young Presidents’ Organization (YPO). 
He and his wife, Jan, were also the honorary chairpersons for Childhelp USA’s Childhelp Drive the Dream Gala.
A native of Modesto, California, Moorad served as Student Body President of Modesto Junior College where he graduated with an Associate of Arts degree. He then went on to obtain a Bachelor of Arts in Political Science from UCLA in 1978, and a Juris Doctor from Villanova University School of Law in 1981. 
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