It was a difficult, rebuilding season atSaturday Night Live, and boss Lorne Michaels promised there would be casting changes for next fall. The first and widely expected one — Brooks Wheelan has been let go after one, hardly memorable season as a featured player with very little screen time. He announced the news on Twitter. “Had a blast and loved every second of it,” Wheelan wrote. “I’m totally honored to be able to make this next joke… FIRED FROM NEW YORK IT’S SATURDAY NIGHT!”