Maybe it was time for a change. Or perhaps it was a way to shake a couple of runs out from the Dodgers' sputtering offense.Dodgers manager Don Mattingly decided to insert pinch-hitter extraordinaire Alex Guerrero into the lineup in the sixth slot, "hoping for him to do his thing."The move also allowed Mattingly to spell left fielder Andre Ethier on Sunday in the finale of the three-game series against the San Francisco Giants as the Dodgers tried to avert a sweep.