Jayson played his college baseball at Washington State from 2005-2008.
In 2008 Jayson was signed by the Los Angeles Angels and spent the 2008 season in the Angels Pioneer League affiliate and went 8-2 with a 2.33 ERA. In (13) starts and 81.1 innings pitched he struck out 68 and only allowed a mere 7 walks.
In 2009 Jasyon was promoted to the Angels Midwest League club and in two starts (12.0 innings pitched) he went 1-1 with a 3.00 ERA and allowed only 1 walk while striking out 11 before being promoted to the Cal league to finish the 2009 season.
Jayson was a member of the Angels AA affiliate (Arkansas Travelers) in 2010
The 2010 Season will mark Jayson's first season as a member of the Sioux City Explorers.