(CNN) -- Nolan Ryan, president and CEO of the Texas Rangers baseball club, was released Tuesday morning from a Houston hospital, the Rangers said in a statement.
Ryan, 64, was hospitalized Sunday after experiencing discomfort at his home in Georgetown, Texas, about 175 miles west of Houston and 30 miles north of Austin.
He "underwent a series of precautionary tests, which indicated no new developments with this recurrence of his heart condition," the Rangers' statement said.
Ryan's pre-existing heart condition will continue being treated with medication, and he is expected to rest at home for the next several days before resuming his duties, the Rangers said.
Ryan had a double-bypass operation in 2000 to correct an arterial blockage in the top left side of his heart.
He was scheduled to be in Anaheim, California, Tuesday night to throw out the first pitch in a ceremony for Gene Autry, the California Angels' late owner, who is being inducted into that team's Hall of Fame.
During 27 years in the major leagues, the fireballing right-hander threw a record 5,714 strikeouts and won 324 games while playing for the New York Mets, the Angels, the Houston Astros and the Rangers.
Ryan was elected to the Baseball Hall of Fame in 1999, and has been the Rangers' president since February 2008. He became the club's chief executive officer prior to the start of this season.