"He took a shot that welcomed him to college football, which was a receiver breakdown," Holgorsen said. "(The receiver) didn't get his guy blocked and (the defender) shot through the gap and ended his day early."
Holgorsen said the first concern was a broken collarbone, but that worry was quickly eliminated.
"I don't know what the timetable is, but he'll be fine," Holgorsen said.
Buie, a true freshman from Jacksonville, Fla., carried 15 times for 30 yards and caught four passes for 11 yards.
"He had some negative plays, but that was more scheme than him," Holgorsen said.
"He's got some juice and he's going to touch the ball a lot. He's going to be a good player. He's just young."
Sophomore running back Trey Johnson (knee) and junior running back/fullback Shawne Alston (neck) didn't play. Alston's injury has bothered him since spring practice and could continue to keep him out, but Holgorsen was hopeful Johnson could return soon.
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THE MOUNTAINEERS used 55 players against Marshall, including just five true freshmen: Buie, running backs Dustin Garrison and Vernard Roberts, cornerback Avery Willians and safety Shaq Petteway.
Along with those five, linebackers Josh Francis and Taige Redman, cornerbacks Ishmael Banks and Cecil Level, safety Wes Tonkery, holder Michael Molinari, offensive linemen Quinton Spain and Nick Kindler and receivers Willie Milhouse and Devon Brown all made their WVU debuts.
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THE MOUNTAINEERS play host to Norfolk State at 1 p.m. Saturday. Former WVU offensive lineman Pete Adrian is the NSU head coach. Former defensive lineman Mark Thurston is the defensive line coach.
With no school Monday, WVU reviewed film in the morning and went through a workout. The team is off today and will practice Wednesday and Thursday in short preparation for the Spartans.
"We need to get (the Marshall) game over with, which will be very important," Holgorsen said. "Everyone knows this: Teams show all their improvement in the first three games."
Contact sportswriter Mike Casazza at mi...@dailymail.com or 304-319-1142. His blog is at blogs.dailymail.com/wvu.