Whenever I hear “injury prone” for a player like Kincaid, I go back to Paul Posluzny, who was universally regarded as “injury prone” when he played for the Bills. Once he left Buffalo for Jacksonville, though, he missed very few games in the 7 seasons he played for them. In five of the 7 seasons, he played every game, and another he played 14 out of 16 games. My point is, while some players ARE injury prone and some are also iron men (ie, Josh Allen, Brett Favre, and even Dion Dawkins), for the majority of players who do miss time, more often than not it’s just bad luck and not a function of internal makeup. Kincaid has played in 42 out of 49 games so far (including playoffs), and hamstring pulls are very common occurrences for all players. So I’m not willing to declare him injury prone just yet.
By way of comparison, TE Hunter Henry missed a LOT of time early on in his career, but he is basically an iron man now. https://www.pro-football-reference.com/players/H/HenrHu00.htm