Former Gator Wide receiver Percy Harvin tested positive for marijuana during February's NFL scouting combine in Indianapolis, two sources told FoxSports.com.

The news could be potentially damaging to the receivers' stock during this weekend's NFL draft.

Harvin was thought to be a first-round pick after leaving the University of Florida following his junior season. NFL teams received the drug-test results earlier this week and players who fail the test are subject to entry into the NFL's substance-abuse program.

Harvin was at his best in big games, earning MVP honors in the 2006 Southeastern Conference championship game and totaling 171 yards and a touchdown in a victory over Oklahoma in the Bowl Championship Series national title game in January -- finishing his college career with 133 receptions for 1,929 yards and 13 touchdowns and 194 carries for 1,852 yards and 19 scores -- averaging almost a first down every time he touched the ball.