The Phillies have the biggest 1st inning in team history as they score 12 runs on their way to a 17 – 3 rout of the Nationals. A bases-loaded triple by Howie Kendrick highlights the frame which features 9 hits and 4 walks against Jeremy Guthrie and Enny Romero. Washington sets a team mark for most runs allowed in any inning.

On April 8, 2017 – The Phillies have the biggest 1st inning in team history as they score 12 runs on their way to a 17 – 3 rout of the Nationals. A bases-loaded triple by Howie Kendrick highlights the frame which features 9 hits and 4 walks against Jeremy Guthrie and Enny Romero. Washington sets a team mark for most runs allowed in any inning.

Source
Baseball Reference April 8