You're basing your decision on half of his resume? That doesn't lead to much of an accurate result. On top of that, which is already bad enough, think about what you're saying: if a guy plays in 22 of 22 games, that somehow excludes him from being injury prone? What is he played the first series in 22 of 22 games only to get hurt and miss the rest of those games?
He has basically missed half of the games he was eligible to play due to injury. That's definitely considered "injury prone," especially considering they are multiple injuries and not just one lingering issue. Besides missing his entire redshirt season due to injury and almost his entire junior season due to injury, he also left a 14-10 game at halftime in 2015 due to injury and didn't return.
Knowing all of that, calling him "injury prone" is not only entirely fair but also very accurate.