| 30 April 2011
The Diamondbacks sent Catcher John Hester to the Baltimore Orioles to complete last year's Mark Reynolds trade. Hester, 27, had excellent numbers for Reno in the Pacific Coast League in 2009 and 2010, but had not played very well in the majors, either offensively or defensively.
Minors
| Year | AVG | OBP | SLG | HR | RBI | BB | K |
| 2008 (AA) | .268 | .302 | .474 | 11 | 49 | 16 | 78 |
| 2009 (AAA) | .328 | .375 | .535 | 9 | 66 | 22 | 65 |
| 2010 (AAA) | .370 | .440 | .667 | 7 | 29 | 16 | 26 |
| 2011 (AAA) | .263 | .326 | .421 | 1 | 5 | 4 | 6 |
Majors
| Year | AVG | OBP | SLG | HR | RBI | BB | K |
| 2009 (NL) | .250 | .300 | .429 | 1 | 4 | 2 | 7 |
| 2010 (NL) | .211 | .292 | .347 | 2 | 7 | 11 | 32 |
Aside from the poor hitting with the Diamondbacks, Hester was doomed by poor defensive results in the Majors. In 2010, he only threw out 3 of 24 base stealers (12.5%), and allowed 21 Wild Pitches and 4 Passed Balls in 239.1 Innings (1 every 9.56 Innings). In comparison, Miguel Montero, not known as a great defensive catcher himself, only allowed 36 Wild Pitches and 6 Passed Balls in 658.1 Innings (1 every 15.67 Innings).
Hester had also been passed on the AAA depth chart by Konrad Schmidt, who is hitting .380/.415/.580 this year, and would be the player called up if a replacement was needed for Montero or Henry Blanco.
