After their bullpen disintegrated in the World Series , the Rangers seemed intent on upgrading their bullpen this off-season. But it seems like signing veteran closer Joe Nathan won't be enough for the Rangers.

Fox Sports' Ken Rosenthal reported Wednesday that the Rangers are still actively pursuing another power arm to add to the pen, and said the team is one of a few still trying to trade for A's closer Andrew Bailey.

"The Rangers, who also pursued Bailey before the non-waiver trade deadline, intend to build the strongest relief corps possible after producing a 7.43 bullpen ERA in their seven-game loss to the Cardinals in the World Series," Rosenthal wrote.

The writer also mentions that the Rangers were aggressively pursuing former Dodgers closer Jonathan Broxton before he inked a one-year deal with the Kansas City Royals yesterday.