Here it is -- the very first footage of Lamar Odom training for his highly-anticipated celebrity boxing match ... and the dude looks like he's ready to go!!
TMZ Sports broke the story ... the 41-year-old, 2-time NBA champion has inked a deal with Celebrity Boxing to step into the ring this summer at the Showboat Casino in Atlantic City, NJ.
While LO's opponent hasn't been announced (yet), it hasn't stalled the dude's preparations ... teaming up with big-time trainer Xavier Biggs to help him prep for the fight.