After Thursday night’s game rookie pitcher Jonathan Pettibone said he will be shut down for three-to-six weeks after an MRI showed inflammation in his right rotator cuff with no structural damage. Down for such a period of time would likely put the pitcher out for the rest of the season Pettibone reasoned. General manager Ruben Amaro Jr. on Friday reiterated Pettibone’s MRI findings adding that the pitcher will travel to Los Angeles to have a second opinion from orthopedist Dr. Neal ElAttrache. “We’re going to be cautious with Jonathan. We don’t want to mess around with him too much” Amaro said. “He has inflammation of his rotator cuff and some of the normal changes on his labrum that normally happen at this stage of his career so we’re going to shut him down.” Pettibone went 5-4 with a 4.04 ERA in 18 starts in his rookie year. He had 66 strikeouts in 100 1/3 innings. Meanwhile Ryan Howard continued to work out in Clearwater Fla. as he recovers from knee surgery. But as far as a return to action this season it all depends on how much actual baseball action the slugger sees during his rehab.