Photos from the former Oregon quarterback's workout.
![Oregon's Marcus Mariota is surrounded by members of the media during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/vm336qyeojcmun0q5hcj.jpg)
Oregon's Marcus Mariota is surrounded by members of the media during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota throws during drills for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/b4n2knegpbc7em6l83fi.jpg)
Oregon's Marcus Mariota throws during drills for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota throws during drills for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/fe73ddbkbhmwul3ibksq.jpg)
Oregon's Marcus Mariota throws during drills for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota throws during drills for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/i4rp6wcp3n2gsyzvri3l.jpg)
Oregon's Marcus Mariota throws during drills for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota gets ready to work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/hqkucthsdgj7ygq7s5hm.jpg)
Oregon's Marcus Mariota gets ready to work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota gets ready to work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/thowph030kkilgs2qy6y.jpg)
Oregon's Marcus Mariota gets ready to work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota works out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/ebaiojsfloy5hypi2fnm.jpg)
Oregon's Marcus Mariota works out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota and Hroniss Grasu work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/zhksrtzyqc8uxyxrehsn.jpg)
Oregon's Marcus Mariota and Hroniss Grasu work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota works out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/usc2wmcxqyxuw0hkmbcw.jpg)
Oregon's Marcus Mariota works out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota and Hroniss Grasu work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/vnvlksjga0rjfjocmydv.jpg)
Oregon's Marcus Mariota and Hroniss Grasu work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
![Oregon's Marcus Mariota and Hroniss Grasu work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)](https://static.clubs.nfl.com/image/private/t_new_photo_album/t_lazy/f_auto/buccaneers/egspirmus4rdkao2hrx8.jpg)
Oregon's Marcus Mariota and Hroniss Grasu work out for NFL football scouts during Pro Day at the University of Oregon, Thursday, March 12, 2015, in Eugene, Ore. (AP Photo/Ryan Kang)
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Tonight begins ESPN's annual series, "Gruden's QB Camp", where former head coach Jon Gruden tutors some of the top quarterback prospects prior to the draft. Gruden served as the Radiers' head coach from 1998 to 2001 before filling the same role with the Buccaneers from 2002 to 2008.
Three prospects will be featured on Tuesday night - Oregon's Marcus Mariota, Baylor's Bryce Petty and UCLA's Brett Hundley. The show will air at 7 p.m. on ESPN2.
"Mariota is special in a lot of ways," Gruden said to ESPN Front Row. "He's a dynamic dual-threat on the field and he is humble – no-nonsense, full of character off the field – 4.52 is what he ran [at the Combine]. He competes like crazy. I just think he has a lot of 'can't miss' qualities."
Florida State quarterback Jameis Winston also participated in the series. His segment will air on Friday, April 10.
ESPN leaked a few clips from Mariota's shoot, which can be viewed below.