Arians reiterated this week at the NFL Annual Meeting that Thomas simply wasn't ready to start games at the NFL level.
"We drafted him for two years from now, not November," Arians said, via the team's official website. "It just so happened his number got called (earlier.) I was not going to let him fail (in San Francisco) because once you fail those scars never go away.
"It's very hard to get the guys back in the locker room if you cost them the playoffs. I just wasn't going to put him in that situation. Right or wrong, it just was my decision."
Who can find fault with that logic from one of the NFL's preeminent quarterback gurus?
Thomas is a developmental project. Success stories in that category are few and far between, but that won't stop Arians from attempting to refine the former Virginia Tech star's immense physical gifts as an alternative to Palmer down the line.