Pittsburgh Penguins defense prospect Derrick Pouliot had successful shoulder surgery Wednesday and is expected to miss 4-6 months.
The 20-year-old had shoulder labral repair surgery.
Pouliot, the eighth pick in the 2012 NHL Draft, was named the Western Hockey League Defenseman of the Year after helping the Portland Winterhawks advance to the WHL championship series.
Pouliot led WHL defensemen in the playoffs with 32 points (five goals, 27 assists) and had a career-high 70 points (17 goals, 53 assists) during the regular season.
TSN's Bob McKenzie reported via Twitter on Wednesday that Penguins rookie defenseman Olli Maatta will have shoulder surgery Thursday that will sideline him for about four months.