Jon Gulbransen was acquired by the Aviators November 8, 2012 in a trade with Gary SouthShore that sent pitcher Kyle Lindquist the RailCats.
In 10 starts for the RailCats in 2012, Gulbransen had a 4-1 record and an ERA of 3.14. Gulbransen also proved to be efficient on the mound, recording a strikeout to walk ratio of nearly 3:1 and gave up just under three walks per nine innings.
In 2011, the 5-foot-11 lefty pitched in 17 games for the Great Falls Voyagers (Rookie League, Chicago White Sox) in 2011 after completing his collegiate career at Valparaiso University.
Gulbransen is classified as an R2 for 2013 (second year rookie).