ANAHEIM, Calif. » Los Angeles Angels right-hander Jerome Williams stayed overnight at a hospital after undergoing several tests.

Williams was hospitalized Monday night when he complained of shortness of breath after he left his start against the San Francisco Giants.

Williams, a Waipahu grad, was released Tuesday.

Angels outfielder Torii Hunter says Williams "passed out" in the clubhouse after leaving the 5-3 loss to the Giants in the fourth inning. The team didn’t confirm Williams passed out.

A team spokesman said the right-hander will return to UC Irvine Medical Center in Orange today for further tests.

Williams (6-5) gave up seven hits and four runs to the Giants in his third straight defeat and second-shortest outing of the season. The veteran is the fifth starter in the Angels’ rotation, improbably revitalizing his career last year and returning to the majors after a four-year absence.