A's prospect Jamie Arnold continues impressive stretch in Double-A

Jamie Arnold, a top 100 MLB prospect for the Athletics, has shown significant improvement in his recent Double-A appearances. After a challenging May, where he had a 7.11 ERA, he posted a 3.67 ERA overall this season. In his last four starts, Arnold has pitched at least 5 ⅔ innings each time, allowing a total of six runs while striking out 31 batters. His development has been aided by the success of his changeup, which he noted has improved since the All-Star break. This performance could lead to a promotion to Triple-A Las Vegas soon if he maintains his current form.

• 7:43 AMYahoo Sports — A's Prospect Jamie Arnold's Changeup Breakthrough Powering Hot Stretch