Stanley Cup. When Hooley Smith arrived in Montreal in 1926–27, Siebert was paired with Smith and Nels Stewart. The trio were known as the "S Line" and emerged as one of the top scoring lines in the NHL. Stewart was the goal scorer on the line while Smith set him up with his passing game, but it was Siebert who used his strength and speed to move the puck out of their defensive zone and to create space for his line mates. His physical style of play occasionally resulted in Siebert being brought in front of league president Frank Calder for supplementary discipline, as in December 1927 when he was suspended for a time following a violent melee with Billy Boucher of the New York Americans. When Boucher responded to an elbow by slashing Siebert over the head, the latter player responded with repeated wild swings of his own stick at Boucher, injuring him. Siebert's best offensive season came in 1931–32 when he finished eighth in league scoring with 39 points. It proved to be his last season with the Maroons, as the team was struggling financially and chose to sell him to the New York Rangers for cash. He went on to win his second Stanley Cup that year. He struggled offensively for much of the season, however, and it was rumoured he would be traded. The trade finally happened early in the 1933–34 season as he was sent to the Boston Bruins in exchange for Vic Ripley and Roy Burmeister. The deal reunited Siebert with former S Line member Nels Stewart. After Eddie Shore was suspended for his assault on Ace Bailey, Bruins coach Art Ross shifted Siebert from left wing to defence. The switch rejuvenated his career; he enjoyed a comeback season in 1934–35. Frequently remaining on the ice for entire games as one of Boston's key players, Siebert earned five votes in a 1935 Associated Press poll naming the top comeback player in sport for that year. He later scoffed at the legend of his comeback in Boston, stating that he never lost his ability to play at the same level he did with the Maroons, instead blaming Lester Patrick for improperly utilizing him in New York. While Shore and Siebert were an effective pairing on defence, tensions between the two were evident. They shared a violent feud when they were opponents, and never spoke a