Walker has allowed three hits over nine scoreless innings so far this spring. He has struck out 13 while walking one batter.
The 24-year-old will look to continue the momentum in his fourth spring start, Wednesday against Kyle Hendricks and the Cubs. According to Nick Piecoro of the Arizona Republic, Walker was sitting in the mid-90s with his fastball in his last outing, reaching as high as 97 mph. Walker underwent arthroscopic surgery on his ankle last October but has not shown any ill effects in camp. He struggled in his final year with Seattle, but if he keeps this up, Walker's stock will soar over the remainder of draft season.