Running hard to first base to try and beat a ground ball, Harper grabbed his left hamstring after reaching the base and limped to the dugout. He will have imaging tests done on Friday.
"I felt a bit of pain in my lower hamstring. We will get an image tomorrow to check it out," Harper said. "We'll see how I feel tomorrow and go from there."
Philadelphia teammate Kyle Schwarber also got injured, leaving the game in the ninth inning due to tightness in his left groin from an awkward throw from the outfield. Schwarber, usually a designated hitter, was playing left field for only the third time this season.
"I bent down to pick up the ball with my bare hand and felt a pull when I planted to throw," Schwarber said. "At first, I thought it was just a cramp and finished the inning. But as I was running in between innings, I could still feel it. I talked to the trainer, and he didn't like the location of the pain, so he wanted to take me out of the game."
Harper said he's "never really had a soft-tissue injury" before. He felt pain about halfway to first base. When asked how worried he was, he seemed cautious.
"I don't know," he said. "Like I said, I've never felt anything like this before. It hurts."
Earlier in the day, fans voted for Harper to start at first base for the National League in the July 16 All-Star Game in Texas. Schwarber is one of six other Philadelphia players who are finalists to start at their positions in the next round of voting.
Harper has a .303 batting average, with 20 home runs and 58 RBIs.
"He felt his hamstring pull while running to first base. We don't know more than that," said Phillies manager Rob Thomson. "We'll have to wait until tomorrow to check him out."
Jake Burger hit a solo home run that put Miami ahead in the eighth inning, following Bryan De La Cruz's three-run double in the seventh that tied the score at 3-3.
Burger hit a first-pitch slider from reliever Jeff Hoffman (3-1) into the left-field seats to break a 4-4 tie. He later hit a single in the ninth inning to drive in another run, making the score 7-4.
"It's always satisfying to do that," Burger said. "It's been frustrating for me the past few weeks not being able to contribute more, so hitting a home run to take the lead and driving in another run in the ninth inning feels great."
De La Cruz drove in four runs with a double in the seventh inning against reliever Matt Strahm, who allowed multiple runs in an appearance for the first time since opening day.
Josh Bell then hit an RBI double to give the Marlins a 4-3 lead. This marked the 200th double of his career. Bell has driven in 48 runs in 62 career games against Philadelphia.
"It didn't look promising for part of the game, but we had a strong seventh inning," Marlins manager Skip Schumaker said. "De La Cruz and Josh Bell came through with big hits. It was a tough, competitive game. Their bullpen is solid. We needed quality at-bats from everyone in the lineup. That's how we scored seven runs."
Anthony Bender (3-2) earned the win in relief, although he gave up an unearned run in the seventh inning that briefly tied the score at 4-4. Tanner Scott pitched a flawless ninth inning to secure his 11th save.
Marlins starter Trevor Rogers allowed three runs and six hits in six innings.
The Phillies took a 3-0 lead starting with Harper's RBI double in the first inning, which extended his hitting streak to 12 games. Harper was selected for his eighth All-Star Game on Thursday, his seventh as a starter, after receiving the most votes among NL players in the initial fan voting round.
Rafael Marchán hit a home run and Edmundo Sosa had an RBI single for the Phillies. Zack Wheeler gave up two runs and seven hits in 6 2/3 innings.
SOURCE: AP News