Lower back is hurty

My lower back is really tight and sore from Friday's OneWorld WOD....7-1 Muscle Ups and DL @ 275 right after I did my 335....not too smart on my part.

Today's WOD:

Morning

Squat 265 x 3 x 5 & 225 x 2 x 5 (to practice form)

I wanted to go for 275 3x5, but my back is too tight and I racked it and wasn't feeling it at all.

Evening

• Snatch - 70% x 3 (95); 75% x 2 (100); 80% x 1 (110); 85% x 1 (115); 80% x 1 (110); 75% x 1 (100)
• Clean & jerk - 70% x 3 (145); 75% x 2 (155); 80% x 1 (165); 85% x 1 (175); 80% x 1 (165); 75% x 1 (155)
• RDL - 55% (of back squat) x 8 x 4
• Hanging leg raise - 3 x 15

3 rounds of max pull ups

3x5 press @ 120