Niklas injured his wrist during Sunday's loss at Buffalo, Darren Urban of the Cardinals' official site reports. In a Monday media session, head coach Bruce Arians said the issue "could be severe."
Niklas has received a consistent snap count this season, earning between 18 and 24 in the first three games, but he's been contained to blocking duties, as evidenced by one reception on two targets for no yards. If the third-year tight end is sidelined for any length of time, his reps will likely be redistributed between Darren Fells and Jermaine Gresham.