Patterson signed for San Carlos in January 2008[3] from Guatemalan side Xelajú, only for him to disappear from the club three weeks later.
[9] This victory also qualified the club to the 2012–13 CONCACAF Champions League, which marked only their third appearance in an international competition.
[10] In the away fixture on 25 October, Xelajú lost 2–1, but still managed to top the group on head-to-head away goals, thus becoming just the second Guatemalan team to ever advance to the quarterfinals.
[11] Patterson started in both legs of the quarterfinals, which ended in a 2–4 aggregate loss to Monterrey, the latter of which on 12 March 2013, and in doing so at the age of 43 years and 32 days, he became the oldest player in the competition's history.
[15] Patterson made his debut for Costa Rica in a July 1993 CONCACAF Gold Cup third-place match against Jamaica.