O'Sullivan played 31 games with Carolina and Minnesota last season, scoring two goals with six assists. The 26-year-old from Winston-Salem, N.C., has 56 goals and 101 assists in parts of six seasons with four teams. He had career highs of 22 goals and 31 assists with the Los Angeles Kings in 2007-08.
O'Sullivan was drafted in the second round by Minnesota in 2003.
It's something that you don't really envision starting this way, but when you put the work in you don't feel like it's unwarranted. You definitely don't envision it unfolding this way, but you do think you can be successful at this level.
— Senators goalie Andrew Hammond, who defeated the Jets on Wednesday to improve to 6-0-1 since making his first NHL start on Feb. 18