Angels place Jerome Williams on disabled list Jerome Williams believes the breathing problems that forced him to be hospitalized after Monday night's 3 1/3-inning start against the San Francisco Giants were caused by "a mixture of asthma and anxiety." The right-hander rejoined the Angels on Wednesday but was placed on the 15-day disabled list to clear a roster spot for Jered Weaver, who will return from a lower-back strain to start Wednesday night's game against the Giants. Williams, who passed out in the Angels" clubhouse Monday night and was transported to UCI Medical Center in Orange by ambulance, was released Tuesday afternoon but returned for more breathing-related tests Wednesday. He said he will undergo a stress test Thursday but that as of Wednesday, doctors have found no signs of an irregular heartbeat or heart ailment. "We're just doing tests, trying to figure out what's going on," said Williams, who admitted he was "maybe a little amped up" to face the Giants, who drafted him in 1999 and released him in 2005. Williams does not take anxiety medication, but he has used an inhaler to manage his asthma in extreme heat or at high altitude. He said he hasn't had an asthma attack "since I was 4 or 5 years old," but he did have trouble breathing during a start for the Chicago Cubs in steamy St. Louis in July 2005. With Williams going on the DL, rookie right-hander Garrett Richards, who is 2-0 with an 0.86 earned-run average in four games, will remain in the rotation and start Sunday against the Dodgers in Angel Stadium. Dan Haren will pitch Friday night, and Ervin Santana will start Saturday. Pitcher Jerome Williams ends night at hospital as Angels lose, 5-3