Twenty-nine teams are represented at the pro day, and Louisville's official Twitter feed said six head coaches were in attendance. One is Bill O'Brien of the Houston Texans, who hold the draft's first pick.
Bridgewater, who is a shade over 6-foot-2, weighed in at 208 pounds Monday morning -- six pounds fewer than at the NFL Scouting Combine but still 12 pounds heavier than his listed weight last season for Louisville. Mayock said on the NFL Network's "NFL AM" that "his size -- or lack thereof" is an issue for some teams.
Bridgewater didn't run or throw at the combine, and one aspect of Bridgewater's workout that will be closely scrutinized is how he moves around with the added weight.
Mayock said one important aspect of scouting quarterbacks is seeing them throw live. "It's one thing to watch all the tape you want, but I want to stand right next to him today and watch him throw the football," he said of Bridgewater.
Mayock said he was impressed with Bridgewater's intelligence and football IQ.
"I had a couple conversations with him at the hotel last night and again this morning and what I liked was his intelligence," Mayock said. "He looks you right in the eye. He's got a presence that you would like from a quarterback."
Mayock reiterated that this was a deep quarterback class, calling it the most diverse quarterback class of the past decade, but mildly disputed the thought that Bridgewater was the most pro-ready quarterback in this class, saying there were some who thought UCF's Blake Bortles was equally as ready or perhaps even more ready.
Mayock also said he was looking forward to Bortles' pro day on Wednesday, noting that he would see two of the top three quarterbacks throw live in a three-day stretch.
Mayock said one thing that stood out about Bridgewater is that he is accurate on short, deep and intermediate throws, but did say he was worried that Bridgewater took too many sacks in 2013.
As for Pryor, Mayock said he loves his aggressiveness and called him a "bigger, faster version" of former Indianapolis Colts star safety Bob Sanders.
"He's tough, smart, he's got good range," Mayock said of Pryor, who was a three-year starter and -- like Bridgewater -- turned pro after his junior season.
Pryor and Alabama's Ha Ha Clinton-Dix are the top two safeties, and while Mayock likes Pryor better, he did say he thought Clinton-Dix was a bit faster and had better range. Both Pryor and Clinton-Dix were clocked at 4.58 seconds in the 40 at the combine, and Pryor will be looking to run in the high 4.4s in the 40 on Monday.
While Clinton-Dix is seen strictly as a free safety, Mayock said Pryor -- who played free safety for Louisville -- could be a strong safety at the next level because of his hitting ability and aggressiveness. "The kid's a missile," Mayock said.