AZL D-backs starting pitcher Blake Walston (39) makes his professional debut during an Arizona League game against the AZL Mariners on August 7, 2019 at Peoria Sports Complex in Peoria, Arizona. AZL D-backs defeated the AZL Mariners 4-1. Walston pitched one inning and allowed one earned run while striking out three batters. (Zachary Lucy/Four Seam Images)
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