The Braves, according to two sources, have not offered Burnett five guaranteed years, contrary to what FOXSports.com reported Wednesday, citing a different source.

The team's offer is for four years with an easily attainable vesting option for a fifth year, the sources said. The total value, if the option were vested, would be approximately $80 million over five years.

For a brief time on Wednesday, FOXSports.com also reported that the Yankees had improved their Burnett offer to five years, $91 million, citing rival executives.

A source with knowledge of the negotiations, however, immediately responded that the amount was inaccurate; the Yankees' offer is believed to be between $80 million and $85 million.

Would the Braves guarantee the fifth year to secure Burnett? Probably. Would the Yankees raise their offer to $91 million to approximate Carlos Zambrano's deal with the Cubs? Perhaps.

But neither has occurred yet.

Burnett, who turns 32 on Jan. 3, could benefit from a return to the National League, where he began his career with the Marlins.

Burnett is coming off an injury-free season in which he went 18-10 with a 4.07 ERA, striking out 231 in 221 1/3 innings. The 221 1/3 innings marks a career high for Burnett, who has dealt with injuries off and on throughout his 10-year career. Burnett came on strong in the second half of the season, and went at least six innings in all five of his September starts with a scant 1.82 ERA in the season's final month.

FOXSports.com's Gerry Fraley contributed to this report.

Atlanta Braves News News » Sources: Braves offer Burnett 4-year deal
Sources: Braves offer Burnett 4-year deal
LAS VEGAS - Talks between the Braves and free-agent right-hander A.J. Burnett "progressed through the night," but the Yankees remain a factor in the Burnett discussions, major-league sources say. MLB Winter Meetings