Is it ok for the NFL to drug test Joe Haden at 3 a.m.? - Sports Illustrated

There's No Reason Why NFL Needed to Drug Test Joe Haden at 3 a.m.

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Joe Haden was chosen to take a random drug test following the Pittsburgh Steelers' win over the Tampa Bay Buccaneers. Is there any reason for the NFL to do this in the middle of the night?