The Red Sox scored four runs off Keller in the first inning and added an unearned run in the second to take a 5-0 lead. He wound up allowing five runs, four earned, and five hits while walking three and striking out two.
Keller entered the game with a 4-8 record and 4.25 ERA in 22 games, including 20 starts, this season. He pitched into the sixth inning in his previous seven starts.
More AP MLB: https://apnews.com/hub/mlb and https://twitter.com/AP_Sports