Some teams lost money in 2009, baseball commissioner Bud Selig said Thursday after the final owners meeting of the year.
"There was no question about that," Selig said. "I don't think the concerns have been ameliorated at all. I think the concerns are still there because all these people have their own economists."
Selig declined to identify the teams.
Major League Baseball's average attendance dropped 6.7 percent last season from an average of 32,528 in 2008 to an average of 30,350. Total attendance of 73.4 million was baseball's fifth-highest.
"Given the economy, the fact that we drew 73.5 million people is a testament to this sport's popularity and everything that has been done is remarkable," Selig said.
Selig said there was no discussion at the meeting of increasing the use of video review by umpires, a subject that has been debated after several missed calls during the postseason.
FREE AGENCY: The Yankees' Andy Pettitte and the Mets' Fernando Tatis became the final players to file for free agency this year.
The pair filed Thursday, the final day of the 15-day window following the World Series.
A total of 171 players filed for free agency.
They can start negotiating financial terms with all teams starting today.
Pitcher John Lackey and outfielders Matt Holliday and Jason Bay head one of the weaker free-agent classes in recent years.
TIGERS: A minor leaguer in the Detroit organization was suspended for 50 games after testing positive for an amphetamine under baseball's minor league drug program.
Double-A third baseman Ron Bourquin was penalized Thursday. He will serve the suspension at the start of next season.
RAYS: Minor league outfielder Desmond Jennings and pitchers Jeremy Hellickson and Alexander Torres were added to the 40-man roster.