KANSAS CITY, Mo. — Pete Alonso hit his 40th home run, breaking the National League rookie record, capping a late outburst by the Mets in their 11-5 victory over the Kansas City Royals on Sunday.
Michael Conforto hit a long homer in the first inning and drove in four runs. Amed Rosario put the Mets ahead by 6-4 with a two-run single in the seventh, and Alonso went deep in the ninth on an 0-2 pitch. He snapped a tie with Cody Bellinger, who launched 39 long balls for the Dodgers in 2017 on the way to winning Rookie of the Year honors.
Back in the thick of a crowded N.L. wild-card race thanks to a second-half surge, the Mets completed a 3-3 road trip and improved to 24-10 since the All-Star break.
Alonso also had an R.B.I. double and scored three times during his second consecutive three-hit game. Rosario had three hits and three R.B.I. out of the leadoff spot, and Joe Panik added three hits as the top four batters in the Mets’ lineup combined to go 11 for 18 with nine R.B.I. and seven runs.
The Mets scored six times in the seventh to turn a 4-3 deficit into a 9-4 lead. J.D. Davis tied it with a pinch-hit R.B.I. single and Rosario had the go-ahead single two batters later. Alonso, Conforto and Wilson Ramos added run-scoring base hits later in the inning.
Jeurys Familia (4-1) got the win, throwing two innings and allowing one run.
Conforto put the Mets up by 3-0 in the first, sending the first pitch he saw from starter Glenn Sparkman 452 feet to right field for his 25th home run.
Sparkman settled down after that to throw six solid innings. He set down 14 of his next 15 batters and pitched around a couple of one-out singles in the sixth.
Mets starter Zack Wheeler didn’t allow a hit through the first three innings, but things snowballed over the next two. He gave up four runs — three earned — on five hits in five innings and committed a costly throwing error in the fifth.
The Royals got one run back in the fourth on an R.B.I. groundout by Ryan O’Hearn, then took the lead an inning later. Kansas City loaded the bases with nobody out and all three runners came around to score. Whit Merrifield had a run-scoring single in the inning. Nicky Lopez and Hunter Dozier also had R.B.I.
Brett Phillips had his first two big league hits of the season, including a double in the seventh. He came into the game 0 for 6 in his first two games of the year.