Ziegler will travel to Los Angeles at some point this weekend to receive a second opinion on his left knee, Nick Piecoro of AZ Central Sports reports. Ziegler has been dealing with a recurring knee ailment, and it looks like he'll attempt to address the matter further as the 2014 season comes to a close. He likely wants to ensure his health for 2015, when he may have an outside chance to earn ninth-inning work for the Diamondbacks. It wouldn't be wise to count greatly on his productivity for the remainder of 2014.