Francisco Alvarez's solo home run in the bottom of the ninth inning lifted the New York Mets to a dramatic 4-3 win over the Baltimore Orioles in Monday's opener of an important three-game series for both teams.

With one out and the game tied at 3-3, Alvarez crushed a 3-0 fastball from Seranthony Dominguez well clear of the wall in left center field to allow the Mets to close the gap in the National League wild card race and knock the Orioles out of first place in the American League East.

J.D. Martinez had a two-run homer in the first inning for New York, which moved within 1 1/2 games of the Atlanta Braves for the NL's final wild card spot with its third win in four games.

The Orioles have now lost three of four and dropped a half-game back of the idle New York Yankees for the AL's top spot.

Baltimore made it interesting, however, by scoring twice in the seventh inning to erase a 3-1 deficit.

Ryan Mountcastle began the rally with a lead-off double and took third on a groundout before being forced home when Mets starter David Peterson was called for a balk. Ramon Urias then followed with a solo home run to knot the score at 3-3.

Peterson had been cruising up until that point and departed after allowing three runs - two earned - while striking out eight through seven innings.

Martinez followed a first-inning single by Mark Vientos with his 13th homer of the season to give the Mets an early advantage. They increased the margin to 3-0 in the fourth when Pete Alonso doubled and later crossed the plate on Tyrone Taylor's two-out single.

The Orioles answered in the fifth with the help of an error by Peterson, who threw errantly on a pickoff attempt to send Urias to third after the infielder reached on a double. Urias would then score on a groundout by Jackson Holliday.

Urias and Mountcastle each finished with two hits for the Orioles, while Baltimore starter Trevor Rogers struck out five while permitting three runs in 4 2/3 innings.

Diaz's homer in ninth caps rally, keeps Astros hot

The Houston Astros also earned a key win via a walk-off home run, as Yainer Diaz's ninth-inning blast gave the AL West leaders a 5-4 comeback victory over the Boston Red Sox.

Houston scored once in each of the final two innings to rally for its 11th win in 12 games, with Diaz delivering the final blow by launching Kenley Jansen's pitch well over the left field wall with one out in the bottom of the ninth.

The Astros tied the game at 4-4 with a two-out rally an inning earlier, as Chas McCormick singled off reliever Lucas Sims and stole second before racing home on Mauricio Dubon's clutch single.

Yordan Alvarez and Victor Caratini each collected three hits to help Houston increase its lead over the second-place Seattle Mariners to five games in the division.

The slumping Red Sox lost for the eighth time in 12 games despite taking a 4-2 lead on Masataka Yoshida's pinch-hit two-run homer off reliever Tayler Scott in the top of the sixth inning. Romy Gonzalez was aboard for the blast after reaching on an error by Houston second baseman Jose Altuve, one of a season-high four miscues for the Astros.

Houston got closer in its half of the sixth, however. Back-to-back singles by Jeremy Pena and Caratini put runners on first and third for Jon Singleton, who drove in Pena with a sacrifice fly to trim the lead to 4-3. 

Astros starter Yusei Kikuchi struck out seven over 5 2/3 innings while allowing three runs, one earned, though his night began ominously when Boston's Jarren Duran connected on his 16th homer of the season on the game's first pitch.

Rob Refsnyder and Rafael Devers each singled later in the first inning before another Houston error - a misplay by rookie third baseman Shay Whitcomb - enabled another run to score.

The Astros were held scoreless by Tanner Houck through the first three innings before breaking through in the bottom of the fourth, which Alvarez began with a double and Diaz followed with a single. Alvarez was later thrown out at home on a fielder's choice grounder, but Caratini singled in Diaz and Pena also scored on the play on an errant throw by Boston catcher Danny Jansen.

Houck worked six innings and struck out eight while surrendering three runs - two earned.

Stone, Muncy propel Dodgers over Mariners in Turner's Los Angeles return

Gavin Stone racked up a career-high 10 strikeouts in seven innings, Max Muncy homered in his first game back from the injured list, and the Los Angeles Dodgers spoiled Justin Tuner's return to Dodger Stadium with a 3-0 win over the Seattle Mariners.

Muncy, sidelined since May 16 by a right oblique strain, came through with a two-run homer in the seventh inning to back Stone's superb start and help the Dodgers win the opener of this three-game series between playoff hopefuls.

Gavin Lux homered earlier in the seventh to break a scoreless deadlock and a terrific pitching duel between Stone and Bryan Woo, who had allowed just one hit until Lux drove a pitch over the wall in center field.

Woo (5-2) then hit Will Smith with a pitch and was removed in favour of Yimi Garcia, who was greeted by Muncy's towering drive to right that quickly made the lead 3-0.

Stone (11-5) yielded just two hits and two walks before departing, with Joe Kelly pitching a scoreless eighth before Evan Phillips retired the side in order in the ninth to notch his 16th save.

Woo was charged with two runs in 6 1/3 innings in slumping Seattle's sixth loss in seven games. The defeat dropped the Mariners five games back of first-place Houston in the AL West.

Turner went 1 for 3 in his first appearance at Dodger Stadium in nearly two years. The 39-year-old infielder made two NL All-Star teams during a successful nine-year tenure with the Dodgers from 2014-22. 

The Boston Red Sox have agreed to a five-year, $90 million contract with Japanese outfielder Masataka Yoshida.

Yoshida, who is a four-time Nippon Professional Baseball (NPB) All-Star, joined the Red Sox the day after he was posted by his Japanese team, the Orix Buffaloes, making him available to MLB franchises.

The Buffaloes are the reigning Japanese champions with Yoshida hitting .335/.441/.561 with 21 home runs, 80 walks and only 41 strikeouts from 508 plate appearances.

The Red Sox will also pay an additional $15.4m posting fee to the Buffaloes, rounding out the bumper deal at $105.4m.

Boston also agreed to a two-year, $32 million contract with former Atlanta Braves closer Kenley Jansen on Wednesday to add depth to their bullpen.

The Red Sox finished bottom of the AL East division with a 78-84 record in 2022.

Aaron Judge stands alone at the top of home run history in the American League after breaking Roger Maris' 61-year single-season homer record with his 62nd blast in the New York Yankees' 3-2 loss to the Texas Rangers on Tuesday.

Judge, who had hit just one homer in his previous 13 games coming in, blasted a 1-1 slider off Rangers' pitcher Jesus Tinoco over the left-field fence for a lead-off homer to break the mark.

The Yankees outfielder's home run was his 62nd of the season, surpassing Maris' 61-homer mark from 1961, which he had matched last Wednesday against the Toronto Blue Jays.

The blast came in the Yankees' penultimate game of the regular season, with Judge's 62 homers sitting seventh for most in a single season in MLB history.

Ahead of Judge are only three players, all from 1997 to 2001; Barry Bonds (73 in 2001), Mark McGwire (70 in 1999 and 65 in 1999) and Sammy Sosa (66 in 1998, 64 in 2001, 63 in 1999).

The home run means 11 of Judge's past 14 blasts have come on the road. Gerrit Cole also made franchise history, reaching 257 strikeouts for the most in a single season for the Yankees.

The Yankees were beaten after the Rangers added two fifth-inning runs, with the visitors having won the first game in the double header 5-4 when Judge went one-for-five with a single.

Braves complete turnaround to clinch NL East

Following their sweep over the New York Mets, the Atlanta Braves clinched their fifth straight National League (NL) East title with a 2-1 victory over the Miami Marlins.

William Contreras drove in the go-ahead run in the fifth inning with an infield single, earning the reigning world champions a first-round bye as the NL second seed. The achievement comes after the Braves had trailed the Mets by 10-and-a-half games in June.

Jake Odorizzi had seven strikeouts across five innings, while Kenley Jansen recorded his 41st save with a perfect ninth inning. Ronald Acuna Jr hit a second-inning single to give the Braves an early lead.

AL seeds locked in as Verlander stars for Astros

The Seattle Mariners locked in the number five seed in the AL playoffs with a 7-6 walkoff win over the Detroit Tigers, highlighted by back-up catcher Luis Torrens pitching the 10th inning.

Entering extras ahead of the postseason, the Mariners shuffled their deck, with Torrens becoming the first position player other than Shohei Ohtani to earn a win since John Baker in 2014 for the Chicago Cubs. Abraham Toro's sacrifice fly allowed Carlos Santana to score the walkoff run.

That result meant the Tampa Bay Rays were locked for the third AL Wild Card spot, not helped by a 6-0 loss to the Boston Red Sox where Xander Bogaerts delivered a fifth-inning grand slam.

Meanwhile, the Houston Astros go into the postseason as the AL top seed after a 10-0 win over the Philadelphia Phillies where Cy Young Award favourite Justin Verlander had 10 K's and kept the opposition hitless until the ninth inning.