pain in my neck
New police video obtained by TMZ Sports shows La'el Collins' car accident was more serious than initially believed ... the Cowboys star complained of neck pain while 2 vehicles sat mangled in a street nearby.
The NFL O-lineman was initially described as fine after he was involved in a wreck on Aug. 20 in Little Elm, Texas ... but you can see in the new footage, Collins was definitely aching.
As he and a responding police officer broke down how his 2015 Cadillac Escalade collided with a Volkswagon .