A spokesperson for the Oktibbeha County Sheriff's Office says they discovered the offensive lineman's body after they were called out to Blackjack Missionary Baptist Church in Starkville regarding a death investigation.

The spokesperson said they canvased the scene after arriving ... but cleared it a couple hours later.

The OCSO official did not release a cause of death ... saying a probe into the case is still ongoing.

They added, though, that they had "no reason to suspect foul play" at this point.

Westmoreland had just joined the Bulldogs roster this year ... and was playing offensive tackle while majoring in industrial technology at the school.

"Sam was a beloved son, brother and teammate, and a tremendous young man with a limitless future," MSU head coach Mike Leach said in a statement Wednesday. "He will always be remembered and deeply missed by everyone who knew and loved him."

Westmoreland was just two days away from celebrating his 19th birthday.