What It Means:

Walker noted on Friday that the blister on his right index finger is almost heeled, but the team will want him to be 100 percent before taking the mound. The D-backs have yet to announce who will start in his place on Sunday against the Marlins.

Walker has a 3.46 ERA and 4.16 SIERA over 52 innings in 2017. His strikeout rate of 20.6 is just below his career average of 21.4 percent.