This week was once going to be the return of defensive tackle Darnell Dockett to University of Phoenix Stadium, after the Cardinals released him in March and he subsequently signed with the San Francisco 49ers a short time later. But that didn't quite work out when Dockett found himself released by the 49ers at the end of the preseason. Dockett remains a free agent.

The reason Dockett is no longer playing in San Francisco is simple, 49ers coach Jim Tomsula said. It was the drafting of fellow defensive lineman Arik Armstead in the first round.

"I've always respected everything Darnell has done on the football field," Tomsula said. "He got here, and quite frankly, didn't realize we'd be drafting a defensive lineman in the first round. From there, didn't really realize how quick Arik's progression was going to be. Coming out of Oregon, he was one of those trimester guys (rookies can't participate in the offseason work until their school year ends) so you're thinking we're not going to have him for anything in the offseason.

"Then Arik got in here ... that was a tough one, man."

Dockett remains a free agent. (He is not expected to be brought back to Arizona.) He hasn't gone away -- recently he took part in this video piece about his search for the murderer of his mother, who was killed when Dockett was 13.