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Pete Alonso sets new NL rookie record with 40th home run

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With a ninth-inning solo home run off of Royals pitcher Jacob Barnes on Sunday, Mets first baseman Pete Alonso set a new National League rookie record for home runs in a single season. He now has 40 with 36 games left in the regular season.

Cody Bellinger, currently the home run leader with 42, hit 39 home runs in his rookie season in 2017, holding the record until today. The major league record is 52, set by the Yankees’ Aaron Judge also in 2017. Judge had broken Mark McGwire’s record of 49 hit in 1987.

Alonso went 3-for-4 with a walk, an RBI double, and three runs scored along with the homer. He’s now batting .271 with a .979 OPS with 40 homers and 95 RBI on the season.

With their 11-5 win over the Royals, the Mets improved to 64-60. They have the same exact record as the Phillies and Brewers, sitting 1.5 games out of the second Wild Card.

Video: Pete Alonso hits home run no. 50

Pete Alonso
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Rookie first baseman Pete Alonso has launched what appears to be the beginning of an auspicious career, made all the more notable by the 50 home runs he’s produced for the Mets so far this season. The All-Star slugger pushed his home run streak to four straight games on Friday, collecting no. 50 on an eighth-inning fastball from the Reds’ Sal Romano.

It’s just the latest of a long line of accomplishments for the 24-year-old infielder. Entering Friday’s series opener against Cincinnati, the first-time All-Star carried a .266/.366/.590 batting line with a league-leading 49 homers, 113 RBI, a .956 OPS and 4.9 fWAR through 648 plate appearances. Among those who are still rounding out their rookie seasons in 2019, he ranks first in home runs and fWAR by a long shot: the White Sox’ Eloy Jiménez is second in home runs with 28 dingers, while the Astros’ Yordan Álvarez plays second fiddle in fWAR with 3.7 Wins Above Replacement.

Even more remarkable: Alonso is the second rookie in MLB history to deliver at least 50 home runs in a single season. The first? Aaron Judge, who clubbed a jaw-dropping 52 homers for the Yankees in 2017.