BALTIMORE -- The New York Mets enjoyed a memorable night in the midst of a season that's worth forgetting.
Plawecki's slam highlighted a 19-hit outburst for the Mets, who reached a season high in runs. Nimmo achieved a career high in hits and had two cracks at completing the cycle; Todd Frazier homered , drove in four runs and fell a triple short of the cycle; and backup third baseman Jack Reinheimer got his first major league hit .
Wilmer Flores also homered for the Mets, who earned a split of the two-game interleague series. New York finished 1/3 this season against the Orioles, who own the worst record in the majors.
The Mets are nestled in fourth place in the NL East and have little chance to salvage a winning season. This game, however, was special to several players, most notably Nimmo.
New York's leadoff hitter was vying for the cycle after going single, double, double, triple in his first four at-bats. He was hit by a pitch in the seventh inning and wrapped up his night with a single in the ninth.
The cycle didn't happen, but Nimmo had no complaints.
"I really was thinking that five hits would be pretty cool, too. Same with getting on base six times," he said. "When I got that last hit I was ecstatic. Nights like these, you kind of just want to bottle up and live with them forever."
Zack Wheeler (8-6) gave up one run and five hits over five innings to win his sixth straight start. The right-hander was removed from the game by manager Mickey Callaway after the Mets sent 12 batters to the plate in a lengthy sixth against Dylan Bundy (7-11) and three relievers.
After Bundy left with two on, Nimmo hit a two-run triple. A wild pitch let in a run and Frazier doubled in two runs before right-hander Evan Phillips issued a pair of walks to load the bases for Plawecki.
Phillips fell behind in the count before grooving a fastball that Plawecki smacked into the left-field seats. It was only his 11th home run in 205 games over four seasons.
"In that situation, I was just trying to find the barrel," Plawecki said. "Obviously it was a really good result."
Bundy allowed seven runs and a career high-tying 11 hits in 5 1/3 innings, a performance that lifted his ERA to 4.99.
"He's not very crisp with his command," manager Buck Showalter said. "He'll make a couple good pitches and just can't finish the at-bat sometimes. A couple of flares hurt him. We know what Dylan is capable of, he just hasn't been able to get there really. It's been off and on."
The bullpen was equally ineffective. After the game, the Orioles optioned Phillips to Triple-A Norfolk.
Jonathan Villar homered for Baltimore and scored twice.
Mets: David Wright (shoulder/back) went 0 for 3 while playing 3B for Class A St. Lucie and is hitless in three rehab games. He has not played a major league game since May 2016. ... Jay Bruce (sore right hip) played 1B and went 2 for 4 for St. Lucie. He has been on the DL since June 18.
Though Mets CF Michael Conforto went 1 for 8 with five strikeouts in the series, he's batting .299 since the All-Star break.
Conforto missed all of spring training after undergoing shoulder surgery last September.
"I think that he's finally finding more of a comfort zone," Callaway said. "He's done a great job of settling in, and we're seeing a more consistent Michael Conforto out there every day."
Mets: It's up to Philadelphia for a single-admission doubleheader on Thursday. Corey Oswalt (1-2) will start the opener followed by Steven Matz (1-2), who's been on the DL with a strained left arm. He will be limited to 80 pitches, Callaway said.
Orioles: A rarity on Thursday for Baltimore, which gets its second day off this week (also Monday). The Orioles open a three-game series in Cleveland on Friday night.
More AP baseball: https://apnews.com/tag/MLBbaseball and https://twitter.com/AP-Sports
Olney: Emotions could push Phillies to sign Harper
Buster Olney still sees the Phillies in pursuit for Bryce Harper, with emotions playing a factor following the Padres' signing of Manny Machado.
Anderson: Machado 'might have' missed boat with White Sox
White Sox SS Tim Anderson isn't worried that Manny Machado didn't choose Chicago and is keeping his focus on the season.
Last place? Cubs laugh off formula that has them finishing under .500
"It's dumb because they have us in last place." Winners of an average of 97 games over the past four years, here's what the Cubs really think about a projection that has them winning 79 games.
Gary Sanchez: Comeback player of the year or bust?
With his awful 2018 season now in his rearview mirror, the Yankees' catcher might be ready to resume mashing.
MLB tiers: Ranking baseball's best relievers
Bullpen consistency can be the difference between a pennant and going home early. Who's best at nailing down wins and protecting leads?
Manny Machado jerseys briefly for sale at Padres' team store
Manny Machado has yet to formally sign his 10-year, $300 million contract with the San Diego Padres, but that didn't stop the team's store at Petco Park from briefly having his No. 13 jerseys available for sale on Wednesday.