There will be a few big leaguers on the mound for triple-A Lehigh Valley this week in Worcester, Mass. Veteran reliever David Robertson made his second appearance for the IronPigs on Tuesday as he continues his ramp-up process after the Phillies signed him on July 21.

Here's a look into the plan that the Phillies has for Aaron Nola when it comes to his rehab starts at the Triple-A level.

NEW YORK -- Philadelphia 's Aaron Nola threw 56 pitches to batters Friday as he ramped up his comeback from a sprained right ankle and fractured rib that have sidelined him since May. A 32-year-old right-hander, Nola could make his first minor league rehab start next week.