Walker (finger) will throw in an extended spring training game Wednesday, Patrick Pinak of MLB.com reports.
Though Walker hasn't been able to get over the blister on his right hand as quickly as the Diamondbacks had hoped, he hasn't experienced any significant setbacks and doesn't seem to be too far off from a return after tossing a 20-pitch bullpen session Saturday. If the simulated game goes well, Walker could bypass a rehab assignment and rejoin the Diamondbacks rotation, though that probably wouldn't happen until early next week. Randall Delgado and one of Braden Shipley or Zack Godley look poised to pick up starts this week while Walker throws at extended spring training.