The surgery "went great," Arians said.
"He was in really good spirits. Texted him back and forth, and he's anxious to get back."
Dockett's surgery was done by Dr. James Andrews at his office outside Pensacola, Florida. Dockett will stay in Florida for the next five days, Arians said, to begin rehab and then return to Arizona.
Last week, Arians said he wants Dockett to have a presence in the locker room and on the sideline during games while he rehabs, so his leadership and spirit continues to permeate through the team. Arizona opens the season against San Diego on "Monday Night Football" on Sept. 8.
The surgery came one week after Dockett tore his ACL during a practice on Aug. 18 at University of Phoenix Stadium. Dockett got hurt while rushing the passer during an 11-on-11 period but Arians had said it was a non-contact injury.
Doctors didn't find any other issues with Dockett's knee. It was the first major injury of his career.
"It was a clean surgery," Arians said. "They're very pleased with it."