He did not. The NFL is the league where guys can hold out during their contract. You are referring to free agency, which is where guys are not currently signed and negotiate contracts. The Petro extension was announced on the 2nd day of training camp in 2013.
Over his first 3 years in the NHL, Petro was 6th in points, 8th in even strength points, and 11th in goals among D men. In his sophomore NHL season, Pietrangelo finished 4th in Norris voting and then in the final season of his ELC he finished 14th.
He had very much established himself as a very high end #1 NHL D man and was the clear #1 D man on the Blues ahead of Jay Bouwmeester, who was making $6.68M against the cap.
It's asinine to act like it was remotely unreasonable for him to "demand" top 10 D money after he had established himself as a top 10 NHL D man by age 23 and he provided significantly more than fair value on that contract.
Yeah Iam not going to use Points to the degree you are, when determining a defensemen's worth. Maybe that's an incorrect approach, who knows.....
Petro's First 3 Seasons
Overall Points Top 10
E Karlsson Byfuglien Yandle Letang Weber Boyle Petro Suter Chara Keith
Note: Burns 19th, Doughty 27th, Lidstrom 28th, Carlson 31st, Giordano 32nd, Hedman 48th
Even Strength Points Top 10
Yandle, Karlsson, Carle, Byfuglien, Letang, Chara, Carlson, Weber, Petro, Burns
Note: Doughty 17th, Hedman 18th, Suter 21st, PK Subban 29th
Chara, Karlsson, Giordano, Hedman, Doughty, Burns, Keith, Letang, PK Subban, S. Weber, R Suter, Lidstrom.....
All Norris Winners or finalists, most of them, multiple times.....Petro was never a finalist
I would have a tough time putting Petro into the top 10 in that time frame.