He posted ERAs of 3.41, 2.23 and 3.11 in his first three seasons. Notably, in 2008, he was 9–5 with a 2.50 ERA for the Quad Cities River Bandits and 2–0 with a 0.50 ERA for the Palm Beach Cardinals. He was 9–6 with a 4.43 record for the Springfield Cardinals in 2010 and in 2011, he was 8-9 between Springfield and the Memphis Redbirds. He pitched for the GCL Cardinals and Memphis in 2012 and in 2013, he was 9–7 with a 4.10 ERA for Memphis. On November 4, 2013, Additon elected free agency.
Baltimore Orioles
On November 16, 2013, Additon signed a minor league deal with the Baltimore Orioles. He played 2014 with the AA Bowie Baysox and the AAA Norfolk Tides. Additon became a free agent after the season.[1]
Milwaukee Brewers
On November 25, 2014, Additon signed a minor league deal with the Milwaukee Brewers. He was assigned to the Triple–A Colorado Springs Sky Sox. The Brewers released Additon on August 2, 2015.[2]
Baltimore Orioles (second stint)
On August 9, 2015, Additon signed a minor league contract with the Baltimore Orioles organization and was assigned to the Double–A Bowie Baysox. Additon played for the Triple–A Norfolk Tides before he was released on August 3, 2016.
Chinatrust Brothers
Additon signed with the Chinatrust Brothers of the Chinese Professional Baseball League shortly after his release from Baltimore. He also began the 2017 season with Chinatrust before being released partway into the season.
Lotte Giants
He joined the Lotte Giants for 2017. At the time of his signing with the Korean club, he had spent part or all of six seasons at Triple-A, going 28–41 with a 4.41 ERA in 559.2 innings.[3]
Colorado Rockies
On August 6, 2017, Additon signed a minor league deal with the Colorado Rockies and was assigned to the Double–A Hartford Yard Goats. In 5 starts with Hartford, Additon registered an 0–4 record and 2.45 ERA with 26 strikeouts in 25+2⁄3 innings of work. He elected free agency following the season on November 6.[4]
Second Stint with Chinatrust
On January 17, 2018, Additon signed with the Chinatrust Brothers of the Chinese Professional Baseball League.[5] On June 9, 2018, Additon threw a no-hitter against the Uni-President Lions, becoming the eighth player in the 29-year history of the CPBL to accomplish such a feat.[6] In December 2018, Additon re-signed with the Brothers for the 2019 season.[7] However, following a start on July 9, 2019, in which he injured his shoulder, he was released by the Brothers the next day.[8]
Retirement
Additon retired as an active player following the 2019 season and later was hired as an international scout for the Chinatrust Brothers.[9]