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Walker (oblique) recently began hitting against a high-velocity pitching machine, MLB.com reports.

Walker, who was placed on the 10-day injured list July 30, continues to check off boxes during his rehab. The process began with running, dry swings, hitting off a tee and then progressed to facing soft-toss pitching. Now, after hitting high-velocity pitches from a machine, Walker's next step is live batting practice.

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