William Kempner was on the phone when he found out that he was heading to the Miami Marlins. The coaching staff had a bit of fun first. He was on the phone with Triple-A Jacksonville pitching coach Jerad Eickhoff when his manager, David Carpenter, tried to break in. Eickhoff and Kempner kept talking and once they were done talking Kempner called Carpenter back. Carpenter told him to come in to throw a bullpen. Kempner was taken aback a bit but agreed. Then, he let Kempner know the good news. “I got pranked,” he said to reporters in front of his locker in a video interview at MLB.com. But, the rookie was blown away by the opportunity. “A lot of emotions you know?” he said of finding out he was heading to The Show. “Trying to get people out here and such It’s surreal and I'm really, really pumped to get after it.” He could pitch as early as Tuesday’s game. He took the roster spot of Chris Paddack , who was designated for assignment.   William Kempner on What’s Next Gonzaga pitcher William Kempner.…