On Thursday, the Blues signed veteran rearguard Jay Bouwmeester to a five-year, $27 million contract extension.
Shortly after the Bouwmeester extension was announced, many questioned why the Blues haven't already locked up Pietrangelo to a new deal.
With around $9 million in available salary cap space for the 2013-14 season, the Blues do not have much flexibility to re-sign Pietrangelo, RFA forward Magnus Paajarvi and potentially add other elements to the roster.
According to a source close to the organization, TFP has learned that Pietrangelo is seeking a similar contract to the eight-year, $56 million deal Drew Doughty signed a couple of years ago with the Los Angeles Kings.
Pietrangelo's numbers are similar to that of Doughty's first three in the NHL, and a similar contract would make him the highest-paid player on the Blues' roster.
In 47 games with the Blues this past season, Pietrangelo registered five goals and 19 assists for 24 points.