Brad Arnsberg heard the news at 4:17 p.m. Mountain Standard Time: The late Roy Halladay, his best student in more than a decade as a pitching coach, had been elected to the National Baseball Hall of Fame. Arnsberg could be sure of the joy he felt, and of the sorrow, because he had known this moment would come. He considered it over the year and a half since Halladay crashed his Icon A5 plane into the Gulf of Mexico. And he could be sure of the time because on his left wrist he wore, as he does every day, the silver Rolex that Halladay gave him a decade ago.