Eric Chavez has been dealing with a left knee injury all season. Chavez felt something in the knee pop the day before the Diamondbacks' trip to Australia, and he's yet to experience any improvement. The ailment helps to explain why he's seen so little time at third base (with Martin Prado moving to left field) following Mark Trumbo's (foot) injury. The D'Backs will have a discussion with Chavez after Sunday's game to determine what to do next.