PhillieBot, a one-armed, three-wheeled robot designed by engineers at the University of Pennsylvania, will throw out the first pitch before Wednesday's game between the Phillies and Brewers. The spectacle is part of Science Day festivities at Citizens Bank Park. The pitching robot has been in the makings for a month and a half as Penn engineers Jordan Brindza and Jamie Gewirtz assembled parts and wrote software in their spare time.