Walker (foot) tossed five scoreless innings in Sunday's start versus the Red Sox, striking out three and walking just one en route to a no-decision.
Walker left his previous start after aggravating a foot problem, but he showed no ill effects Sunday, allowing just one man past first base and throwing 63% of his pitches for strikes. He was lifted after throwing just 88 pitches, so he should be relatively fresh for his next start Friday against the Cardinals at home.