Why don't you post stats of Henne's 2nd year and compare, instead of comparing a 2nd year starter to a 5 yr starter.
No need for anyone to post Henne's 2nd season. His season now isn't as good as Tannehill's. The only stat he's better in is lost fumbles and INTs.
Henne this year, his 5th in the NFL:
Henne - 230 for 382 - 60.2 percent - 2,436 yards - 8 TDs 10 INTs - 21 rushes for 54 yds - Sacked 28 times - 74.9 rating
Tanny - 280 for 451 - 62.1 percent - 3,115 yards - 17 TDs 13 INTs - 34 rushes for 164 yds and 1 TD - Sacked 45 times - 83.2 rating
Henne has never thrown more TDs than INTs in any of his seasons. The most TDs he's ever thrown in a season is 15 and that was on 490 attempts.