One of them he's already had to watch from the sidelines because of injury.
That's why he's determined to play Saturday after leaving this past Thursday's game against NC State in the first quarter with a dislocated finger.
"The biggest question mark we have is Castillo," Coach Bobby Bowden said.
"We worked him today to see if he could snap the ball and from what I saw he did."
Castillo is scheduled to undergo magnetic resonance imaging (MRI) on Tuesday to determine the extent of his injuries.
If surgery is required to repair his fingers, Castillo could either have surgery following the UF game or after the Seminoles' bowl game.
Castillo also sustained tendon damage in the middle and ring finger on his snapping hand (right).
He was replaced by Brian Ross for the final three quarter of the game, since his usual back-up John Frady was sidelined with a separated left elbow he suffered in practice prior to North Carolina, Oct. 2.
Although Castillo did not return to the game, he said Monday that he felt fine and was able to the snap the ball adequately in practice.
Castillo also worked a few snaps with his left hand in case he's unable to use his right hand Saturday.
Bowden said the plan is to use Frady if necessary, but his preference would be to keep Frady off the field and apply for a medical hardship at the end of the season.
"Today was the first day I brought my helmet out here. I'm going to be on emergency duty against Florida," Frady said.
Frady started in place of an injured Castillo in the first two games of the season, Miami and Alabama-Birmingham.