Leaf, a former standout quarterback for Washington State, was the No. 2 pick in the 1998 draft behind Peyton Manning. But Leaf flamed out as quarterback for the San Diego Chargers, gaining a reputation as one of the biggest busts in NFL history.
Leaf's defense attorney in the Texas case, Bill Kelly, said Saturday that he hadn't spoken to his client. Leaf's father, John Leaf, called Kelly on Friday to tell him about the arrest, he said.
"His dad was pretty upset, of course," Kelly said. "People get hooked on these things and it's hard to get off of them. It's just a sad, sad deal because he was doing so well."
Last year, Leaf had surgery to remove a benign tumor from his brain stem and later underwent additional radiation treatments.
On March 21, Leaf told an Associated Press reporter in an email exchange that he had struggled through treatments and had an MRI scheduled for the end of the month, but "I'm doing/feeling much better and am excited for the rest of 2012."
Farren said if the Texas judge revokes Leaf's probation, he could go to prison for longer than the 10-year probation term. The judge could treat each of Leaf's drug charges in Texas — seven counts of obtaining a controlled substance by fraud and one count of delivery of a simulated controlled substance — separately because that's the way the plea deals were done, he said.
Some of the charges carry a sentence of up to 20 years in prison.
"The judge could stack them," Farren said.
Last year, Leaf wrote a book titled "596 Switch" — the name of a passing play in the Washington State playbook — that focused on the 1997 season when he led the Cougars to their first Rose Bowl in six decades.
Seattle communications consultant Greg Witter, a friend of Leaf's who co-authored the book, said Saturday that Leaf has been "diligent" about fighting his addiction, including admitting himself to rehab around Christmas 2010 when he saw inklings of his old behaviors surfacing.
"I'm hopeful this is a misunderstanding of some kind and that Ryan can continue making the great strides in his life that we've all seen over the last three years," he said.
Blaney reported from Lubbock, Texas.