Diaz (calf) started at third base and played five innings in Triple-A Las Vegas' win over El Paso on Tuesday, going 1-for-3 with an RBI single.
Diaz (calf) will begin a rehab assignment with Triple-A Las Vegas this weekend, Martin Gallegos of MLB.com reports.
Diaz (calf) ran the bases at Oakland Coliseum on Wednesday, Martin Gallegos of MLB.com reports.
Diaz (calf) has resumed taking batting practice but is not yet running the bases, MLB.com reports.
Diaz (calf) has begun a running program as part of his rehabilitation process, the Associated Press reports.
The Athletics placed Diaz on the 60-day injured list Thursday with a right calf strain.
Athletics manager Mark Kotsay said Monday that Diaz (calf) is likely to begin the season on the injured list, Martin Gallegos of MLB.com reports.
Diaz (calf) has yet to resume baseball activities as of Sunday, Martin Gallegos of MLB.com reports.
Diaz (groin) suffered a calf strain recently while running the bases, Martin Gallegos of MLB.com reports.
Athletics manager Mark Kotsay said Wednesday that Diaz (groin) has been cleared to resume baseball activities, Martin Gallegos of MLB.com reports.