NFL legend Willie Gault -- one of the fastest men in NFL history -- is getting back on the track to help a suspended world class Para-athlete make a triumphant return to Track & Field.
TMZ Sports has learned Gault is training Blake Leeper ... a Paralympic star who in February was slapped with a 1-year suspension from USADA stemming from a positive cocaine test in 2015.
We talked to Willie during a training session with Blake ... and he told us he took the gig 'cause he thinks Leeper deserves a second chance to chase that gold medal.