Matt Moore reportedly made the decision to undergo season-ending Tommy John surgery on his left elbow late Monday night, but according to executive vice president of baseball operations Andrew Friedman, the decision has been a difficult one.

"Most other elbow situations that I've encountered have been much more binary," Friedman said in a conference call Tuesday afternoon.  "It's either the guy needs to have Tommy John or not.  This was one of the first ones that I can remember that was much more in the grey area."

Friedman admitted that there was "disruption" in Moore's pitching elbow, but not a complete tear of the ulnar collateral ligament.

"We spent a lot of time over the weekend consulting with Dr. [James] Andrews and Dr. [Koco] Eaton and trying to figure out risk-reward what made the most sense," he explained.  "At the end of the day, after all the conversations and all the things we did, it really came down to how Matt felt."

Moore experienced discomfort while playing catch Monday in Baltimore with head athletic trainer Ron Porterfield, and Friedman said once that occurred, surgery was going to be the only option available.  The left-hander will have surgery performed by Dr. Andrews next week, so that Moore can salvage as much of the 2015 season as possible.

Click below to hear the entire conference call.