Former NFL wide receiver Reche Caldwell -- who spent 6 seasons in the league -- was arrested in Florida yesterday for allegedly trying to sell Ecstasy ... officials say.
The 35-year-old -- played for the Chargers, Patriots and Redskins -- was busted at an apartment in Tampa around noon ... after cops say he was trying to slang some E pills.
Caldwell was booked for possession of a controlled substance. Bail was set at $2K.
It's more trouble for Caldwell who was arrested earlier this year for allegedly running an illegal gambling ring.