Height and weight discrimination?

My husband was hiring by a mining company(open pit) he was informed the other day not to come in for his next shift as he is simply too big to do any of the jobs. He is 6'6" and 350lbs. The job he was doing that day was outside directing trucks where to dump. You cannot tell me he is bigger than the great outdoors! They did not terminate him just said they will not be calling him. He was suppose to full time after his 3 months probation which would have been in 3 weeks. He was told his work was great and his co-workers enjoyed working with him he is just too big. Were they blind when they hired him and it took them this long to see?? He is also Metis...hum makes you think? Does he have a valid law suit and any lawyers out there want to try this

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