A few hours after the Cubs’ 2013 first-round pick Kris Bryant hit a walk-off homer in the 12th inning for Class AAA Iowa, the Cubs cut ties with 2009 first-rounder Brett Jackson, trading the AAA outfielder to the Arizona Diamondbacks Thursday night for minor-league relief pitcher Blake Cooper.

Jackson, 26, hit .210 with five homers for Iowa before the waiver-claim trade. In a 44-game debut with the Cubs two summers ago, he hit .175 with four home runs and 59 strikeouts in 120 at-bats. He has not played in the majors since.

Cooper, 26, was a Southern League All-Star for AA Mobile (1.85 ERA in 24 appearances) before a promotion to AAA Reno, where the right-hander had a 6.00 ERA in 17 appearances – with only two runs allowed in his last six outings (8 2/3 innings), with eight strikeouts.