Grizzlies G Nick Calathes suspended 20 games for drug violation

Nick Calathes' (12) suspension will begin immediately, which will make him ineligble for the Grizzlies' series against the Thunder.

Mark D. Smith/Mark D. Smith-USA TODAY Sports

Memphis Grizzlies point guard Nick Calathes has been suspended for 20 games for violating the NBA’s anti-drug policy.

The league said Friday night in a release that Calathes tested positive for tamoxifen. The suspension begins Saturday night when the Grizzlies take on Oklahoma City in Game 1 of their first-round playoff series.

Yahoo Sports was the first to report the suspension.

Calathes, a 25-year-old rookie reserve, averaged 4.9 points and 2.9 assists in 71 games this season.