Craig Sager, Gregg Popovich

In most cases, Gregg Popovich is a sideline reporter's nightmare. However, over the years, his brevity with Craig Sager has matured into one of basketball's best rapports. Through Sager's two-year fight with cancer, Popovich has become one of Sager's most public supporters.

With Sager's cancer no longer in remission from leukemia, the pin company Patti Lapel is releasing a Sager-Popovich pin earlier than expected. A reported 15 percent of proceeds from the pins, which cost $10, will go toward cancer research.

When Sager first left his post at TNT after a leukemia diagnosis in 2014, his son, Craig Sager Jr., took over, leading to this now-infamous conversation with Popovich:

But as Pop says, the interviews are better with Craig, who returned for two different TNT stints while fighting cancer. Here is Popovich's reaction to Sager's second return, earlier this season.

In a recent HBO Real Sports interview, Sager revealed doctors told him he has only three to six months to live if he were not to receive treatment.

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