The 6-foot-4, 258-pound Kubina is in the final year of a two-year $7.7 million contract that has a cap hit of $3.85 million this season, according to Capgeek.com. He will be an unrestricted free agent after the season.
The Flyers will have to make other moves. They are believed to be $1.93 million over the salary cap with the acquisition, according to Capgeek.com.
A likely move is sending Marc-Andre Bourdon to the minors. Bourdon struggled in Saturday's loss, with five turnovers and a minus-1 rating. His cap hit is $850,000.
The Flyers now have 51 players under contract and must get rid of one contract to get to the NHL organizational limit of 50. In addition, they must trim one player to get down to their 23-man active roster.
On Thursday, the Flyers traded for defenseman Nicklas Grossman from Dallas for a 2012 second-round pick acquired from Los Angeles for Mike Richards and a 2013 third rounder that the Flyers received from Minnesota for Darroll Powe.
Grossman played his first game for the Flyers in Saturday's 6-4 loss to the visiting Pittsburgh Penguins, logging 18 minutes and 26 seconds and finishing a plus 1 and a team-high eight hits.
Kubina, who turns 35 in April, is a one-time all-star who was a key member of Tampa Bay's 2004 Stanley Cup championship team.
He has served two stints with Tampa Bay. This season in 52 games, Kubina had three goals and eight assists and a plus one rating.
What this deal shows is that the Flyers are not willing to give up on this year, despite having inconsistent goaltending.
Columbus general manager Scott Howson was at Saturday's game, where he met with Flyers general manager Paul Holmgren.
Speculation is that Columbus cornerstone Rick Nash is the subject of trade talks. The NHL trade deadline is Feb. 27.
Flyers rookie Eric Wellwood had mixed emotions. He scored his first NHL goal on Saturday, but it came in a defeat. His goal late in the second period tied the score at 3-3.
"It was bittersweet," said Wellwood, who became the eighth Flyers rookie to score his first NHL goal this season. "I thought my goal came at a good time, right at the end of the period to tie it up. Seemed like we got the momentum and they got that quick goal after the first shift."
One of the former Flyers who will appear at Sunday's Flyer Wives Carnival is Reggie Leach, a key member of the 1975 Stanley Cup championship team, who is seventh on the team's all-time goal-scoring list with 306 goals.
The event, which begins at noon, is the largest fund raiser for Comcast-Spectacor Charities. This will be the 35th annual carnival.
"Back then it was a big fund raiser and I didn't think it would get as big as it is today," Leach said in talking to reporters between periods of Saturday's game.
Contact staff writer Marc Narducci at firstname.lastname@example.org, 856-779-3225 or @sjnard on Twitter.