Rocker struck out 10 while allowing one hit and zero walks over five scoreless innings Wednesday for Triple-A Round Rock.

Rangers general manager Chris Young confirmed Thursday that Rocker will be promoted from Double-A Frisco to make his next start with Triple-A Round Rock, Evan Grant of The Dallas Morning News reports.

Rocker will be activated from High-A Hickory's 60-day injured list and will be assigned to Double-A Frisco on Friday, Jeff Wilson of RangersToday.com reports.

Rocker (elbow) will begin a rehab assignment with the Rangers' Arizona Complex League affiliate on Friday, Kennedi Landry of MLB.com reports.

Rocker (elbow) threw a three-inning bullpen session May 18 and could be cleared to face hitters this week, Evan Grant of The Dallas Morning News reports.

Rocker (elbow) has progressed to 120 feet with his throwing program, Evan Grant of the Dallas Morning News reports.

Rocker (elbow) underwent season-ending Tommy John surgery Monday, Jeff Wilson of RangersToday.com reports.

Rocker will have Tommy John surgery later this week, Evan Grant of The Dallas Morning News reports.

Rocker allowed one hit over a scoreless eighth inning in Tuesday's spring game against the Rockies.