Gruden impressed with Manziel

JACKSONVILLE, Fla. -- Johnny Manziel aced his pro day workout on Thursday. He completed 64 of 66 passes, showed the ability to make a variety of throws, and was under control when throwing on the run.

Most of those watching -- including ESPN's Ron Jaworski, who has said he wouldn't take Manziel in the first three rounds -- came away impressed.

But we all know that being an NFL quarterback is more than just having the physical ability. The mental part of the game is just as important, and Manziel apparently nailed that, too.

Jon Gruden ran Manziel through his quarterback camp and had a lot of praise as well as some criticisms.Insider He said Manziel reminds him of Steve Young and can energize whichever franchise drafts him in May, whether it's Houston at No. 1 or Jacksonville at No. 3 or any of the other teams that need quarterbacks. Gruden also said Manziel has to learn to be satisfied with a checkdown instead of trying to make a big play on every snap.