Mezue ahịrịokwu na-esonụ: Na mbido oge 2018, na egwuregwu Eprel 11 megide New York Yankees na Fenway Park, Kelly kụrụ Tyler Austin na pitch, na-esote slide nke Austin nke a na-ebo ya ebubo na ọ na-eme ka onye na-egwu egwuregwu Brock Holt. Austin boro Kelly ebubo ma malite ọgụ na mgba; a chụpụrụ ndị egwuregwu anọ, gụnyere Kelly. Nke a bụ nke mbụ a chụpụrụ Kelly n'ọrụ ya. N'April 12, MLB kwụsịtụrụ Kelly maka egwuregwu isii ma kwụọ ya ụgwọ ego a na-ekwuputaghị; o mechara rịọ arịrịọ, na-enye ya ohere ịnọgide na-egwu egwu ruo mgbe usoro mkpesa ahụ gwụchara. N'ụbọchị 26 nke ọnwa Eprel, a jụrụ arịrịọ Kelly, nke pụtara na nkwụsịtụ ya ga-amalite site n'oge ahụ gaa n'ihu. N'oge a machibidoro ya iwu, Kelly lere egwuregwu site n'oche ndị na-ekiri ihe nkiri na Fenway Park. Ọ pụtara na egwuregwu 73 kachasị elu maka Red Sox, na-ejedebe na 4.39 ERA na innings. Na postseason, Kelly mere ihe ngosi itoolu, na-atụgharị innings mgbe ọ na-ekwe ka otu na-agba ọsọ ma na-eti 13. Ọ bụ ya bụ onye na-agba bọọlụ nke meriri, na enyemaka, nke egwuregwu 4 nke
World Series, dịka Red Sox meriri Los Angeles Dodgers na egwuregwu ise.