Helsley (elbow) will begin a rehab assignment at Triple-A Norfolk on Thursday, Cordell Woodland of 105.7 The Fan Baltimore reports.
Helsley was cleared to throw live batting practice Monday, and after getting through it without any problems, he's now set to test his elbow in a game setting. The 31-year-old closer has been on the shelf since the beginning of May and will likely require multiple tune-up outings before coming off the IL.