It's safe to say Jon Gruden is comfortable with his quarterback room heading into the 2020 campaign.
"He's interesting," Gruden said, according to ESPN's Paul Gutierrez. "He took off a couple times today and it really fired me up. He's been hurt, but (it) looks like the ankle really turned a corner. He's a dazzling playmaker with his feet and that's the key to his game.
"I saw glimpses of that today. It's exciting. Started off slow on seven-on-seven (drills), but (he) picked it up, had a nice day. Had a real nice day."
Gruden has repeatedly stated this offseason that Derek Carr is firmly entrenched as the Raiders' starter, but Vegas inked the former No. 2 overall pick after five inconsistent years with the Tennessee Titans.
Mariota lost his job last season to Ryan Tannehill, but profiles as one of the NFL's more reliable backups.