Demaryius Thomas: Thanks, Prez Obama! For Cutting Grandma's Drug Sentence

President Obama is now officially the hero of Demaryius Thomas' family after cutting the wide receiver's grandmother a huge break on her life sentence.

Minnie Pearl Thomas is one of the 214 prisoners who got their prison sentences commuted by the Prez on Wednesday. Minnie got sentenced to life in prison in 2000 for running a cocaine distribution ring, but now she's set to be released Dec. 1 ... thanks to Obama.

Demaryius said this "Couldn't be a better day" ... as he gave the President a shout-out for giving families like his "second chances."