The college football season kicks off in 17 days and, to honor the number, we turn back the clock to a perfect 17 for TCU against Grambling State on Sept. 8, 2012.

TCU's Casey Pachall and Trevone Boykin combined to complete all 17 of their passes in a 56-0 win over Grambling. The 17 completions in 17 attempts remains the most passes without an incompletion by one team in a single-game in FBS history.

Pachall started and was a perfect 9-for-9 for 201 yards and three touchdowns. A young redshirt freshman in Boykin, playing his first career game, finished 8-of-8 for 75 yards and a touchdown.

Boykin, of course, would go on to lead TCU to national prominence and was fourth in the Hesiman Trophy balloting in 2014. He finished up his career last season passing for 3,575 yards and 31 touchdowns for the Horned Frogs.

TCU opens the 2016 season on Sept. 3, hosting FCS power South Dakota State.

In case you missed any part of our countdown:

18 days: Ohio State is college football's road warrior

19 days: There are 19 head coaches who will take the field for their alma mater this season.

20 days: It has been 20 years since Florida won its first national championship.

21 days: Oklahoma led the nation in average scoring margin last year at 21.5 points per game.

22 days: Ohio State has been in the top 10 of the AP poll for 22 consecutive weeks.

23 days: Virginia Tech has the longest streak of seasons ending with a bowl game.

24 days: In the first game of the historic rivalry, Navy beat Army 24-0.

25 days: Desmond Howard won the Heisman 25 years ago.

26 days: Arkansas State led the nation with 26 interceptions in 2015.

27 days: Clemson's Greg Huegel led the nation with 27 field goals in 2015.

28 days: Adrian Peterson wore No. 28 for Oklahoma.

29 days: Alabama's Bryant-Denny Stadium opened in 1929.

30 days: Vinny Testaverde won the Heisman 30 years ago.