Despite not allowing more than two earned runs in either of his first two June starts, Mariners starting pitcher prospect Taijuan Walker is 0-1 this month at Double-A Jackson. Walker does have a 2.19 ERA and .214 opponents' batting average, while striking out 14 batters in 12 1/3 innings through two June starts.
Jackson is 3-6 with a 2.52 ERA and .194 opponents' batting average in 12 starts. He has struck out 77 batters, walked 29 and allowed six home runs in 71 1/3 innings. Unfortunately, he's winless in his last six starts (0-4).