Matt Cullen and rookie Pascal Trepanier scored for the Ducks, who are 0-2-2 in their last four games following a club-record seven-game winning streak and ended a string of seven consecutive periods without scoring a goal.
The Eastern Conference leaders thought they had tied the score 1-1 at 8:28 of the first period, when Radek Bonk made two nice stickhandling moves near the Anaheim net to avoid defenseman Ruslan Salei and Hossa converted the setup in front. But the goal was called back after a replay review showed one of Magnus Arvedson's skates in the crease as he was wedged between two defenders.
The Senators, who outshot Anaheim 15-2 in the second period, finally scored at the 12:41 mark after sweating out another in-the-crease ruling by the video goal judge.
Tomas Sandstrom was serving an interference penalty when Yashin got a pass at the goal line from Andreas Dackell and slid the puck between Guy Hebert's feet as the goalie hugged the left post. Yashin's 10th goal in seven games trimmed Anaheim's margin to 2-1 and put him one ahead of Philadelphia's Eric Lindros and John LeClair on the goal-scoring list.
Teemu Selanne, who hasn't had a goal or assist in three consecutive games since his club-record 17-game point streak, hit the post with 6:22 left in the second period and the Senators tied the score about four minutes later.
Hossa got the puck from Arvedsoin the right circle, made a slick move around Cullen and beat Hebert from directly in front for his 10th goal of the season.
Damian Rhodes fell behind 1-0 at 7:08 of the first when he fanned on Trepanier's low slap shot from the right point after Marty McInnis beat Shawn McEachern on a faceoff deep in the Ottawa zone.
The rookie defenseman's second goal of the season ended a scoreless streak by the Ducks that lasted 164 minutes and 52 seconds including 4-0 and 1-0 road losses at Dallas and Phoenix. The only time the sixth-year expansion team has been blanked in three consecutive games was March 1994, by San Jose, Chicago and Buffalo.
Cullen scored the Ducks' second goal on a one-timer from 45 feet, beating Rhodes to the stick side after Jeff Nielsen set him up with a pass from the left boards for his 100th NHL point.
The Senators, who average the fewest penalty minutes per game in the league, drew their only whistle from referee Dennis LaRue when former Anaheim defenseman Jason York was sent off for hooking Paul Kariya at 2:32 of the third.
©1999 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed