ATLANTA - Diamondbacks right-hander Daniel Hudson has a tear in his ulnar collateral ligament that could require "Tommy John" surgery, a procedure that would knock him out for at least 12 months.

Hudson's agent, Andrew Lowenthal, said his client will seek a second opinion, likely with renowned surgeon Dr. James Andrews of Birmingham, Ala.

Diamondbacks General Manager Kevin Towers told KTAR today that Hudson has a "100 percent tear" of the UCL, which would require the ligament replacement surgery named after former pitcher Tommy John.

Hudson was evaluated by Diamondbacks team physician Dr. Michael Lee on Wednesday in Phoenix.

Hudson left in the second inning of his start against the Atlanta Braves on Tuesday night, saying after the game that he had been pitching through elbow soreness for at least the past three starts, something he had not shared with the team.

Hudson, the Diamondbacks' No. 2 starter entering the year, has suffered through a miserable season, struggling to both stay healthy and pitch effectively. He had shoulder problems that landed him on the DL earlier this season.

Hudson was placed on the disabled list Wednesday and reliever Jonathan Albaladejo was optioned to Triple-A Reno. Left-hander Pat Corbin was recalled and will pitch out of the bullpen.

Right-hander Josh Collmenter will move into Hudson's spot in the rotation. He'll start Sunday in Milwaukee and make at least one other start, Gibson said, adding that the club will reevaluate the rotation at the All-Star break.

Shortstop Stephen Drew was activated from the disabled list and is in the starting lineup, batting second.