Option declined following 2018 season.
Olum spent five years with Sporting Kansas City before joining the Timbers ahead of the 2017 season. Olum, a veteran who is sure to provide depth for Portland's backline and midfield, has also contributed to his clubs' offensive efforts, scoring in each of his last four seasons.
INTERNATIONAL: Olum has made four appearances for the Kenyan Men's National Team.
OUTSIDE MLS: Olum has played with Orlando City (2011), the Austin Aztec, Minnesota Thunder and the Portland Timbers (2007/08) before making his MLS debut. Played in Malaysia in 2015.
COLLEGE: After moving to the United States as a teenager, played four years at Missouri Baptist University (NAIA).