|Arizona Diamondbacks – No. 7|
Born: May 13, 1977|
|April 11, 2003, for the Arizona Diamondbacks|
|Last MLB appearance|
|September 28, 2011, for the Arizona Diamondbacks|
|Runs batted in||48|
Hammock was drafted three times: in 1995 by the Florida Marlins, in 1997 by the Tampa Bay Devil Rays, and in 1998 by the Arizona Diamondbacks. He played five seasons at various minor league levels from 1998 to 2002. In 2003, he played in 65 games for the major league club, batting .282 and starting 28 games at catcher. His numbers were good enough to earn him a place on the 2003 Topps All-Star Rookie Roster. Robby was the third catcher behind Chad Moeller and Rod Barajas for Arizona in 2003.
Along with Matt Kata, Alex Cintrón, Brandon Webb, and others, he was one of the "Baby Backs" who were called up when a surge of injuries hit Diamondbacks veteran players in 2003. The Baby Backs were popular and contributed to a winning season, but ultimately failed to make the playoffs.1
In 2004, Hammock made two brief minor league stops before rejoining the Diamondbacks. He played in 62 games, starting 46 at catcher and hit .241 with 16 doubles that season. On May 18, 2004, he caught Randy Johnson's perfect game.
Hammock did not appear in a major league game in 2005, and only played in three games for the Triple-A Tucson Sidewinders. He was on the roster for the 2006 Sidewinders, in which he played multiple positions. He was called up after the Sidewinders won the Pacific Coast League Championship game, and appeared in only one game.
Hammock was non-tendered following the 2008 season, and became a free agent. On January 12, 2009, he signed a minor league contract with an invitation to spring training with the Baltimore Orioles.
Hammock signed a minor league contract with the Diamondbacks for the 2011 season. He was previously in the D-Backs' minor-league system, managing in 2014 for the Visalia Rawhide and 2015 and 2016 for the Mobile BayBears.
In November 2016 Hammock was named as quality control/catching coach for the Arizona Diamondbacks.
- D-backs do not tender 2009 contracts to four
- Jeff Zrebiec (2009-01-12). "Orioles ink J. Cabrera, Hammock to minor league deals". baltimoresun.com. Archived from the original on May 22, 2011. Retrieved 2009-01-12.