2007-08: Mark Letestu started his first professional season on the Wheeling Nailers but was quickly called into AHL action in early November in a series of moves that started with Tyler Kennedy being called up by the Penguins.
2008-09: Letestu spent the entire season with Wilkes-Barre/Scranton of the AHL where he had something of a breakout season, posting 24 goals and 37 assists in 73 games. At the end of the season he was signed to a two-year standard NHL deal.
2009-10: letestu had another solid season in the AHL where as the Baby Pens top center, he posted 21 goals, 34 assist in 61 games. He also made his NHL debut mid-way through the season, playing in a third-line role and potting a goal in 10 total games. The Penguins also game Letestu some time in the NHL playoffs, where in four games he posted an assist.
A strong skater, Letestu makes his living as a playmaking center by trade. While he is not the strongest forward along the boards, Letestu is capable of dictating the play in the offensive zone. What Letestu does lack in grit and physicality he makes up for in sound positional play. Despite being not overly effective along the boards, he is a strong skater with good balance and understands his limitations and his role within the team. The skilled forward however will never likely be a great offensive threat in the NHL, as to this point his talents haven't translated on the scoresheet.