Cam'ron is telling Ja Morant he's seen hoop dreams deflate ... and doesn't want the embattled NBA superstar to flush his career for being too in love with the streets.
The Diplomats founder was once a top basketball prospect coming outta Harlem in the mid-1990s ... but didn't take his academics seriously and saw his career fizzle after tearing his hamstring at junior college in Texas.
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Cam'ron shared pics of his basketball playing days throwing up a gang sign to show Ja how unfocused he was at the time, where he says he got kicked outta college for pistol-whipping someone.