The Orioles are "all in" on free agent starter A.J. Burnett, reports Peter Gammons of GammonsDaily.com (via Twitter). Also in the mix are the Rays, according to Gammons.

Burnett's reported decision to enter the open market promises to have a major impact on how the remaining free agent starting pitching situation plays out. In certain respects, Burnett is the most attractive remaining starter. (In particular, he was outstanding last year and figures to be had on a short-term deal.) As the newly reported interest of the Rays demonstrates, he could appeal to a variety of clubs, including those that had not been rumored to be players on the rest of the market.

But, as Gammons says, Burnett has only just begun the process of chosing a club. With pitchers and catchers reporting within a matter of weeks, and the starting pitching market still de-thawing from its Tanaka freeze, Burnett could potentially create further hold-up on the rest of the market. Teams like the Orioles, for instance, might conceivably hold off on other top options like Ubaldo Jimenez or Ervin Santana until Burnett has made his decision. And, as I noted previously, if Burnett lands with a club that had intended to add a starter, there could be less demand left for the other best open-market arms.