Athletics' Zach Jackson: Removed from 40-man roster

Oakland transferred Jackson (elbow) from the 15-day injured list to the 60-day IL on Wednesday.

Jackson won't be eligible to rejoin the Athletics until after the All-Star break, as he was initially placed on the 15-day IL on May 19 with a flexor tendon strain in his right elbow. The move clears a 40-man roster spot for right-hander Angel Felipe, whom Oakland claimed off waivers from San Diego.