Walker will serve as the Giants' opener Wednesday against the Angels, Susan Slusser of the San Francisco Chronicle reports.

EDGE Analysis

Walker will be making his eighth start of the season Wednesday. While he hasn't pitched more than three innings in any of his appearances this year, Walker has been effective on the mound with a 2.52 ERA, 1.19 WHIP and 41:11 K:BB through 39.1 frames.