Trineyev, mentored by Aliaksei Protas at the start of his AHL career, has become one of the Hershey Bears' best players, serving as a major contributor offensively and defensively. He is the first player off the bench for the penalty kill and also gets power-play time on the team's second unit. He currently sits second on the team in points with 12 (6g, 6a) in 15 games. He rooms with Ilya Protas and Eriks Mateiko.