[Hulk01]

Here you go:

Costello passing, by down:

1st: 53.7%, 4.99 ypa, 3 touchdowns, 1 interception, 18% first downs
2nd: 65%, 9.01 ypa, 6 touchdowns, 0 interceptions, 36% first downs
3rd: 55.7%, 8.24 ypa, 5 touchdowns, 2 interceptions, 44% first downs

This isn't common, as you can easily guess. 

I don't have a theory for this.  He/coaches tend to call shorter passes on first down (seems likely from the stats) but KJ struggles completing them. 

[Hulk01]

Here you go:

Costello passing, by down:

1st: 53.7%, 4.99 ypa, 3 touchdowns, 1 interception, 18% first downs
2nd: 65%, 9.01 ypa, 6 touchdowns, 0 interceptions, 36% first downs
3rd: 55.7%, 8.24 ypa, 5 touchdowns, 2 interceptions, 44% first downs

This isn't common, as you can easily guess. 

I don't have a theory for this.  He/coaches tend to call shorter passes on first down (seems likely from the stats) but KJ struggles completing them.