Does This horse look lame??

Also forgot to mention, that I release immediately. And how exactly would I get him less stiff? I warm him up as I've always been told to. Walk for 10 minutes. Trot for 10 minutes and lope for 5 minutes.

I think you've gotten some great advice. I don't see lame either. I think AC hit the nail on the head about him looking like a speed horse that's been in a tie down for awhile. He is tense and bracing. I don't see a horse anywhere near ready to learn reining maneuvers.

Take it slow and back to the basics. Even if he's had previous riding, treat him like a colt that needs a foundation. He needs to learn to give to the bit & relax. Spend a lot of time just walking and doing that and putting a good relaxed neck rein on him before moving on to a faster gait or advanced maneuvers. Once he's light & supple at a walk, then move on to jog.

Thanks MH! Advice is greatly appreciated.!

Keep in mind that a finished reiner was green at one time too and the truly great reiners never left the walk for the first 2-4 months.