Sometimes weigh in numbers listed on team websites are correct and sometimes they are not. There's really no absolutes. Over the years, I've read articles or heard interviews where players provide weights that match exactly what's listed on the website and some where players have given numbers not even close to what is listed. And these are players on the same freaking team. Also some teams update their websites regularly and some do not.
In the end, only the individual, their teams, and whomever the individual (or teams) have confided in knows the exact weight of these players at any given moment. Not message board posters outside of that circle.
Besides, a player's weight can change during the course of a season. And combine weigh in numbers are only accurate on that day as players add or drop weight just for the event every single year. And sometimes these changes are dramatic.
Never argue with an idiot.