Two significant faults in the team were noted by the media: the club allowed 247 goals, third-highest in the league.
The logjam at the goaltending position was resolved on June 26, when general manager Bryan Murray completed a trade that saw Robin Lehner and forward David Legwand go to the Buffalo Sabres in exchange for the 21st overall pick (acquired by Buffalo from the New York Islanders in the Matt Moulson-Thomas Vanek trade) in the 2015 NHL Entry Draft.
On June 27, Murray completed another trade, sending defenceman Eric Gryba to the Edmonton Oilers in exchange for prospect forward Travis Ewanyk and a fourth-round 2015 draft pick, 107th overall, which the Senators used to select defenceman Christian Wolanin of the Muskegon Lumberjacks in the United States Hockey League (USHL).
[3] On July 26, an arbitrator awarded RFA right-winger Alex Chiasson a one-year contract worth $1.2 million.
[4] On August 3, an arbitrator awarded RFA left-winger Mike Hoffman a one-year contract worth $2 million.
Phillips confirmed the report by informing Ottawa Sun sports columnist Bruce Garrioch that he cracked a disc in his back and there is currently no timetable for his return.
[7] The Ottawa Senators played an eight-game preseason schedule beginning on Monday, September 21, 2015, and finishing on Saturday, October 3, 2015.
The schedule featured split squad games against the Toronto Maple Leafs and home-and-home series against the Buffalo Sabres and Montreal Canadiens.
[8] On Sunday, October 11, 2015, rookie goaltender Matt O'Connor made his NHL debut against the Montreal Canadiens in a 3–1 loss.
[9] In February 2016, the Senators and Toronto Maple Leafs made a sensational trade of nine players and a draft pick.
Below are the Ottawa Senators' selections at the 2015 NHL Entry Draft, held on June 26–27, 2015, at the BB&T Center in Sunrise, Florida.