"I'd be a liar if I said I wasn't excited to see him play," Pettine said in his first remarks following the most high-profile quarterback change of the season.
"We're not trying to install a new play book in a week," Pettine said. "We'll just be highlighting different portions of it."
He later added: "We're not going to turn every play into a punt return," but conceded that Manziel's mobility will be a factor in his subtle changes.
It seems like Pettine is genuinely curious. After seeing Shanahan's work with Robert Griffin III in Washington, there is an unknown that can propel a team, especially with a quarterback like Manziel.
Now, the task at hand will be prepping the rookie for calling a full NFL game, something that Manziel was obviously not ready for at the outset of the season -- or else he'd have leapfrogged Hoyer in the first place.
As of Wednesday morning, that step seems to be going well. Manziel was at the facility late into the night.
"I know a lot of people were looking for him at the Cavs game," Pettine said, referencing a report about the staff's dissatisfaction with seeing their star sitting courtside instead of reading the playbook. "But he was here."