After two seasons in A ball, he was promoted to AA Binghamton in 1999, where he went 4-2 with 83 strike outs in 56.2 innings, with a 2.38 ERA. He then was promoted to AAA Norfolk for nine games to close out that season.
In 2000 at AAA Norfolk, he went to 6-2 with a 1.70 ERA, striking out 67 batters in 63.2 innings. Cammack was first called up on April 28th, where he came in relief of Mike Hampton in a game at Colorado. He allowed four runs on four hits in a 12-5 Mets loss.
Cammack was back in AAA Norfolk, returning to the
Mets three more times during the year, pitching in eight games overall.
Cammack would pitch in the Mets minors through 2003. He then went on to the Houston Astros & Oakland Athletics' organizations, retiring after the 2004 season.