1:
Run on first down for 1 yard - so effectively an incompletion
Pass on second down

2:
Pass on first down incomplete
Pass on second down

3:
Sacked on first down
Pass on second and third down

4:
Incomplete on first down
Run for 2 yards
Then another run on 3rd. I got the feeling this was an RPO and JR made the decision to run but IDK.

5:
Incomplete on first down
Run for 4 yards

6:
Incomplete on first down
Pass on second down

7:
One yard loss on first down run
Complete pass on second down

8:
One yard loss on first down run
Intercepted pass on second down

9:
Incomplete pass on 1st down
Run for 2 yards on 2nd down


So in general I would say they passed on second down after a first down play that was negative or incomplete.