George Kirby allowed four runs over 5 1/3 innings while not factoring in the decision Friday against the Diamondbacks.

Kirby had no issues over the first three innings, but fell apart late; something that has been a problem for the 28-year-old in his last few outings. He gave up a solo homer to Geraldo Perdomo, and four more runs came across in the sixth — three of them charged to Kirby — to erase the Mariners’ 5-1 lead. Kirby still possesses a solid 3.77 ERA on the season with a 59/17 K/BB over his 74 innings, but there have been some cracks in the armor as of late. He’ll try and put it all together against the Mets on Wednesday.