Medina (knee) began a rehab assignment Wednesday in the rookie-level Arizona Complex League and was charged with six earned runs on six hits and zero walks while striking out three over two innings.

Medina (knee) is scheduled to throw around 45 pitches Wednesday in a simulated game at extended spring training, Martin Gallegos of MLB.com reports.

Medina (knee) faced hitters during a 20-pitch live bullpen session at the Oakland Coliseum on Monday and came away feeling good, MLB.com reports.

Medina (knee) is scheduled to throw a bullpen session Tuesday, Martin Gallegos of MLB.com reports.

Medina (knee) threw a successful bullpen session Tuesday, the Associated Press reports.

Medina (knee) is on track to begin a rehab assignment next week, Martin Gallegos of MLB.com reports.

Medina (knee) has started a running program, the Associated Press reports.

The Athletics transferred Medina (knee) from the 15-day injured list to the 60-day IL on Thursday.

The Athletics placed Medina on the 15-day injured list Thursday, retroactive to March 25, with a right knee MCL sprain.

Athletics manager Mark Kotsay said Wednesday that Medina has been diagnosed with a Grade 2 sprain of the MCL in his right knee, Martin Gallegos of MLB.com reports.