On December 20, 1966, Klein and business associate
Sam Schulman, plus a group of minority investors, obtained the
National Basketball Association franchise for the city of
Seattle, Washington. Schulman would be the active partner, serving as president of the basketball team and head of operations. Prior to this, Klein and Schulman had already made a major investment in sports following the June 1966 announcement of the merger of the
American Football League and the
National Football League. On August 25 they led a group of investors who purchased the
San Diego Chargers for $10 million, at the time, a record price for a National Football League franchise. The majority owner, Klein served as the team's president and head of operations. During his time with the Chargers football club, Klein became involved in a much publicized feud with
Al Davis, the then managing general partner of the
Oakland Raiders. Their differences resulted in a lawsuit in which a
San Diego Superior Court jury held Davis responsible for a
heart attack Klein suffered in 1981. The verdict was overturned on appeal. While he was the owner of the San Diego Chargers in the mid-1970s he hired coach
Don "Air" Coryell and assembled a team that kept people engaged with the Chargers because of the high scoring offense. During this time the Chargers offense had three future
Hall of Fame inductees with
Dan Fouts as quarterback,
Kellen Winslow at tight end, and
Charlie Joiner at wide receiver. Other notable receivers were
All-Pros
John Jefferson and later
Wes Chandler. The city became highly engrossed in the franchise and pro football led all professional sports teams in the area; the baseball team and basketball team did not compete in their respective sports to nearly at the same level during this era. The Chargers won
AFC West division titles in 1979–1981 and also made the playoffs in 1982. In 1980 and 1981, they reached the
AFC Championship game but lost both times and never advanced to the
Super Bowl under Klein. Klein refused to renegotiate player contracts, most notably Jefferson's and defensive end
Fred Dean's contracts at the beginning of the 1981 season. The situation led to both players being dealt away by the Chargers. While Jefferson was replaced by Chandler, future Hall of Famer Dean's departure on defense coincided with the Chargers surrendering the most passing yards in the NFL in both 1981 ==Thoroughbred horse racing==