Tristan Beck cleared to throw again after aneurysm, plus updates on SF Giants' other injured pitchers

Three months since an aneurysm was discovered in his right shoulder, Tristan Beck was cleared to throw a baseball Friday and will begin his progression to return to the mound sometime this season. The big step for Beck, 27, came after his latest follow-up appointment with Stanford vascular specialist Dr. Jason Lee, and was just one of a number of developments among injured Giants pitchers that the team provided before opening a four-game series against the Phillies. Beck will start a light throwing program Monday in San Francisco, joining Alex Cobb in throwing off flat ground. Neither pitcher can be activated until May 27, though manager Bob Melvin indicated it's more likely Cobb will be ready by then than Beck.