Cole, the 18th pick in the 2007 NHL Draft by the Blues, has four goals, nine points and a plus-16 rating in 54 games this season. He has nine goals, 31 points and is plus-40 in 167 regular-season games over parts of five seasons.
"You're always hoping for more, but you look at St. Louis' defense and that's a very experienced, almost star-studded defense. So, you can understand why sometimes he may be in and out of the lineup," Penguins GM Jim Rutherford said. "He brings good depth to our blue line. He's had a very good year this year and we hope that continues here."