Sparano had the luxury of playing against Tebow last year as head coach of the Miami Dolphins. Sparano even coached Tebow two years ago at the Senior Bowl when the former University of Florida star entered the draft.
But Sparano said on a conference call Thursday that this is the best he's seen Tebow as a passer, which is one of Tebow's biggest critiques.
"I thought fundamentally Tim has gotten much better," Sparano said of Tebow's throwing. "You can see the amount of time he spent on it, and really this kid has put a lot of time in the offseason from a fundamental standpoint. He's completely different now than he was when he came out of college."
Tebow is expected to play a unique role in the offense, which should include plenty of work at quarterback in New York's Wildcat package. Sparano was coy about the team's plans with Tebow but said everything is on the table.
The Jets are hopeful to improve their 25th-ranked offense from a year ago under Sparano. They have some talented pieces, such as Tebow, tight end Dustin Keller, and receivers Santonio Holmes, Jeremy Kerley and Stephen Hill.
"A lot of guys have a lot of hands in this and done a great job," Sparano said. "I'm excited about the possibilities that we have."