Ex-49er Bruce Miller Pleads Not Guilty In Assault Case

Ex-49ers RB Bruce Miller has plead not guilty to 7 felonies after allegedly beating the crap outta a 70-year-old man and his son.

As we previously reported, the former 49er is accused of severely beating an elderly man and his son back in September ... after cops say he tried to force his way into the man's hotel room.

Miller, 29, appeared before a judge in San Francisco ... and entered a not guilty plea for 7 felonies and 1 misdemeanor ... including assault with a deadly weapon and inflicting injury on an elderly person.

If convicted, Miller -- currently a free agent -- faces a lengthy prison stint.