Golden State Warriors Steve Kerr has been in the business of basketball for quite some time now. As a player, he played 15 seasons between 1988 and 2003, winning five championships along the way.

As a head coach, Kerr is currently in his 11th season and he has since led the Warriors to four NBA titles.

Before he took over the helm in Golden State in 2015, however, Kerr was the general manager for the Phoenix Suns between 2007 and 2010, which is the same team that drafted him in the second round of the 1988 NBA Draft.

According to Kerr, it was during his time as the Suns’ head honcho that he had an alarming experience that has stuck with him through the years.

“I traded Shawn Marion for Shaq (O’Neal) and I got death threats,” Kerr told reporters on Wednesday after being asked about his most controversial trade decision. “Email death threats. Our security in Phoenix looked into it.

“I was never overly concerned. I have taken it for what it was, which was an angry fan typing away. But it’s still pretty disconcerting when somebody threatens your life.”

For context, Kerr was talking about his controversial decision to send Shawn Marion, who at that time was named an All-Star four times in six seasons, and Marcus Banks to the Miami Heat in exchange for a 35-year-old Shaquille O’Neal, who for his part, was already at the tail end of his career.

Clearly, one fan was so incensed by Kerr’s decision that they resulted in threatening his life.

In his interview, Kerr would go on to say that he feels for Dallas Mavericks Nico Harrison, who himself has reportedly been receiving death threats, after his decision to trade Luka Doncic to the Los Angeles Lakers in exchange for Anthony Davis.

According to Kerr, “there has to be a line that exists” in terms of fans expressing their criticism towards team executives. That line was “clearly crossed,” expressed Kerr.