Chlapik was reassigned to AHL Belleville on Wednesday.
White was reassigned to AHL Belleville on Wednesday.
Karlsson will be retained by the Senators -- at least through the 2018 NHL Entry Draft, the Ottawa Citizen reports.
Smith finished the year with five goals and 14 assists throughout 68 games, averaging 16:43 of ice time.
Claesson played in 64 total games in 2017-18, logging 158 hits and collecting a goal and six assists.
Englund was bumped down to AHL Belleville on Sunday, per the official AHL transaction log.
White closed his season on a high note, providing an assist on both of his team's goals in a 5-2 loss to Boston on Saturday.
Dzingel had both of his team's markers Saturday, but it wasn't enough in a season-ending 5-2 loss to Boston.
Harpur (shoulder) will miss Saturday's regular-season finale against the Bruins.
Englund was recalled from AHL Belleville on Saturday.
Harpur separated his right shoulder in Friday's game against the Penguins and won't return.
Stone (leg) will sit out the remaining two games of 2017-18, Mark Lazerus of the Chicago Sun-Times reports.
Dzingel scored what proved to be the winning goal in the second period and added an assist on Alex Burrows' empty-net goal Wednesday in a 4-2 win over Buffalo.
Stone (leg) will remain out of the lineup for Wednesday's game against the Sabres, TSN 1200 Ottawa reports.
Condon was diagnosed with a concussion, effectively ending his 2017-18 campaign, TSN 1200 Ottawa reports.
Karlsson (personal) will skip the team's final road trip of 2017-18, TSN 1200 Ottawa reports.
Condon sustained an upper-body injury at practice Tuesday and will not be in action versus Buffalo on Wednesday, TSN 1200 Ottawa reports.
Coach Guy Boucher doesn't know if Karlsson will travel with the team for its three-game road trip, TSN 1200 Ottawa reports.
Stone (leg) will be a game-time decision against the Sabres on Wednesday, Brent Wallace of TSN.ca reports.
Condon will defend the cage against the Sabres in Buffalo on Tuesday, TSN 1200 Ottawa reports.
Stone (leg) won't play Monday against the Jets, TSN 1200 reports.
Condon allowed two goals on 27 shots in a losing effort to host Detroit on Saturday.
Condon will tend the twine for Saturday's road matchup against the Red Wings.
Stone (leg), who was seen at morning skate, will not play Thursday night against the Panthers, Brent Wallace of TSN.careports.
Stone (leg) was seen on the ice at the Senators' morning skate on Thursday.