Mock with the Washington Nationals
|Born: April 25, 1983|
|June 8, 2008, for the Washington Nationals|
|Last MLB appearance|
|April 9, 2010, for the Washington Nationals|
|Earned run average||5.17|
Mock attended the University of Houston where he played as part of the Houston Cougars baseball team. In 2003, he played collegiate summer baseball in the Cape Cod Baseball League for the Yarmouth-Dennis Red Sox, where he was named the Eastern division MVP of the league's annual all-star game.
On August 7, 2006, Mock was acquired by the Nationals along with fellow minor league pitcher Matt Chico in a trade for veteran right-handed pitcher Liván Hernández. After joining the Nationals organization, he pitched for the Harrisburg Senators of the Double-A Eastern League, compiling a 10.26 ERA in his first 4 starts, all losses. His 2006 season ended September 2, after undergoing surgery to repair a tear in the patella tendon of his knee.
In 2007, Mock posted a win-loss record of 2-7 and an ERA of 5.12 in 15 appearances for the High Single-A Potomac Nationals, Rookie-Level Gulf Coast Nationals and Double-A Harrisburg Senators. During the 2007-2008 off-season, Mock pitched for the Peoria Javelinas of the Arizona Fall League. On October 23, 2007, Mock was added to the Nationals 40-man roster.
In 2008, after starting the year with the Triple-A Columbus Clippers, Mock made his major league debut on June 8, giving up four earned runs in innings. Mock was selected for the International League roster at the 2008 Triple-A All-Star Game. On August 7, Mock was recalled by the Nationals from Columbus. He would spend most the rest of the season as a relief pitcher including a 1.93 ERA in the month of September.
Mock had neck surgery in 2010 and was out most of the season.
The Toronto Blue Jays signed Mock to a minor league contract on December 1, 2011. Mock was later released from his contract with the Blue Jays during the week of February 17, 2012. On March 2, 2012, Mock signed a minor league deal with the Boston Red Sox with an invitation to their minor league camp.
On August 3, Mock was traded to the Houston Astros for future considerations. Mock was 3-2 with a 3.33 ERA and 5 saves in 35 appearances over innings with Triple-A Pawtucket before the trade. Mock pitched in 12 games with Triple-A Oklahoma City, striking out 15 over 13 innings.
The Diamondbacks released him from his minor league contract on August 18, 2013.