placed second in NHL rookie scoring with 24 points in 35 games before being dealt at the trade deadline (along with a 2013 fourth-round draft pick) to the Ottawa Senators in exchange for goaltender Ben Bishop on April 3, 2013. Conacher's first full season with the Senators was a difficult one, as he struggled to find offensive consistency. Through his first 58 games of the season he recorded only four goals and was a healthy scratch on multiple occasions. Conacher's offensive struggles were perhaps magnified by the fact that goaltender Bishop, the player he had been traded for, was playing very well in Tampa Bay and was frequently receiving mention as a Vezina Trophy candidate. On March 4, 2014, the eve of the 2013–14 NHL trade deadline, Conacher was placed on waivers by the Senators. He was subsequently claimed by the Buffalo Sabres on March 5, 2014. The Sabres declined to offer Conacher a contract extension, which allowed him to become a free agent on June 30, 2014. The team was undecided in regard to retaining his rights, only deciding at the last minute to release him. On July 1, 2014, Conacher was signed as a free agent by the New York Islanders on a one-year, $600,000 contract. After playing in 15 of the team's first 29 games, Conacher was placed on waivers by the Islanders on December 12, 2014. He cleared waivers and was assigned to the team's minor league affiliate, Bridgeport Sound Tigers, the following day. On March 2, 2015, Conacher was traded to the Vancouver Canucks, in exchange for Utica Comets player Dustin Jeffrey. He was assigned to AHL affiliate, the Utica Comets, securing an offensive role to help the club reach the Calder Cup finals. On July 1, 2015, Conacher left the NHL as a free agent and signed a two-year contract with Swiss club, SC Bern, of the NLA. In December 2015, he was selected to play for Team Canada at the Spengler Cup and helped win the title, while being named to the tournament's all-star team. He won the National League A title that same season with SC Bern, scoring 5 goals in 14 playoffs games. On July 13, 2016, Conacher once again signed with the Tampa Bay Lightning of the National Hockey League to a one-year, one-way contract. On January 29, 2017, Conacher was added to the 2017 American Hockey League All-Star Classic