EntertainmentThe following is a guest blog from Austin O’Connor. You can read his full piece on his grandfather here. Well, it happened. He threw the pitch. Twice, actually. After months of training, my grandfather walked out onto the field on a spectacularly sunny afternoon at Fenway Park last Saturday to toss the ceremonial first pitch on his 100th birthday. As the ballpark PA announcer ticked off the highlights of his biography — Bill Hogan, Jr., President of the Boston College class …