Jason Kubel was signed as a free agent to a two-year, $14 million contract after the 2011 season. After putting up monster numbers in the first half of 2012 (.290/.365/.563/.926 with 22 home runs and 72 RBI through July 31st), Kubel went into a nosedive. The last two months of 2012 saw just eight home runs, a .171 batting average and a .183 BAbip. In 2013, he has hit for a .220 average with just five home runs and 82 strikeouts.
The Diamondbacks have had a plethora of outfielders all season. Even with the injury to Cody Ross, Kubel's playing time has been greatly diminished. Kubel started only 10 games since the All-Star break and has just seven hits.
By designating Kubel for assignment, the Diamondbacks have 10 days to trade him to another team. If there is no trade, the Diamondbacks will be on the hook for the remaining of his $7.5 million salary this season. Kubel could accept an assignment to the minor leagues (unlikely) or be released.
David Holmberg, tonight's starting pitcher, is being selected from Double-A Mobile.