During his tenure with the San Diego Padres
|Born: May 24, 1980|
|September 10, 2006, for the Colorado Rockies|
|Last MLB appearance|
|October 2, 2012, for the New York Mets|
|Earned run average||3.23|
San Diego Padres
On August 10, 2008, Hampson pitched a scoreless fifth, sixth and seventh innings for the win after starter Chris Young gave up 7 runs in four innings in a 16-7 win over the Rockies. Hampson was released by the Padres on April 1, 2009.
On May 27, 2009 Hampson signed a Minor League contract with the Oakland Athletics.
New York Mets
On February 16, 2011, Hampson signed a minor league contract with the New York Mets. On June 25, 2012, he was called up by the Mets after Vinny Rottino was designated for assignment. However, on July 4, he was designated for assignment after just three relief appearances. He was called up again September 4 along with five other players as part of the Mets' September callups and proceeded to pitch in 10 games over the remainder of the season, yielding two runs in 8 2/3 innings. Following the season, Hampson was outrighted off the Mets' 40-man roster, and he declared free agency. He signed a minor league contract with the Mets on February 18, 2013.
- Padres' 25-man roster takes shape
- Adam Rubin [@AdamRubinMedia] (18 February 2013). "The #Mets re-signed lefty reliever Justin Hampson. Straight to minor league camp" (Tweet) – via Twitter.