Keith Arnold last night reported that he's been playing with a broken thumb. Maybe that's common knowledge and if it is I apologize because I didn't know that.
The first catch he should have had - no question.
The second catch - no way. His momentum, the grass and a very opportunistic last second hand by the DB made that a nearly impossible catch. I'm not sure if any receiver playing at any level could have hauled that in given the circumstances. A lot happened on that play after it intially hit his outstretched hands.