Chris Pratt, Alex Rodriguez, Josh Duhamel and Michael Peña were among those who warmed up the historic course at Riviera on Monday in advance of the PGA Tour's Genesis Invitational.In the second annual Celebrity Cup powered by CDW, teams of six amateurs captained by Tiger Woods and Bubba Watson faced off in a four-ball net better ball match-play event that began on Riviera's iconic 10th hole, followed by Nos.