Then in the span of a couple weeks, Cassell went from offerless to the owner of 15 offers.
"Truthfully, I didn't expect any offers until my senior year started," said Cassell. "But ever since Arizona State gave me that first offer, everyone it seems has been offering me."
And more could be coming.
Cassell said he doesn't mind waiting for more schools to offer, since he's in no real rush to decide.
"I want to weigh all of my options before I decide," said Cassell. "Any offer I get, I'll take into consideration. I want to be able to visit the colleges."
With the Bruins, their proximity to home is what intrigues him.
"UCLA is definitely a school I'm interested in and I'd love to have an offer from them," said Cassell. "I've been able to take a visit up there and see what it's like. I went to their scrimmage (last month) and saw them practice."
He also took an unofficial visit to Arizona State last month for their Junior Day.
"I really liked it out there," said Cassell. "It was real cool and the coaches are all good people."
Cassell said most schools see him as an outside backer, which is his preference.
As far as camps are concerned, Cassell has a couple in mind.
"I might be going out to Colorado and the San Diego State camp, and possibly Fresno State," said Cassell.
Academically, Cassell has a 3.1 and took the SAT earlier this month.
As a 2009 junior, Cassell had 69 tackles and six sacks.