Manaea (arm) threw 39 pitches off the mound Tuesday and has been cleared to make a rehab start for High-A Stockton on Friday, John Shea of the San Francisco Chronicle reports.
Manaea was placed on the 15-day DL on June 14 after leaving a start the night before due to a pronator muscle strain in his left forearm. He seems to have progressed well over the last week and appears on track to return when eligible June 29. Manaea is 2-4 this season with a 6.02 ERA during 49.1 innings with the A's.