WATCH: Bryce Harper fumes after foul ball during Phillies game

Bryce Harper is one of the few unfiltered personalities on the baseball diamond. Good or bad, the Philadelphia Phillies slugger hardly hides his emotions, and those were on full display on Sunday against the Cleveland Guardians.

In the bottom of the seventh inning, Harper faced Hunter Gaddis with a man on first base. Gaddis threw a 93-mph heater right at the middle of the plate, which the first baseman fouled off in the stands. What followed was an outburst from the former MVP, which resonated on the live broadcast, leaving spectators and commentators surprised.

Harper, who wanted to deposit the ball out of the park, was livid with himself for not doing so. He let his frustration out with a loud "F**K."

Harper went 0-3 along with one walk. The Phillies lost 4-3 to drop to 65-40 on the season.

The team is in a rough stretch, going 3-7 in its last 10 games. The offense has been silent for some time, and with the Mets surging from behind, the Phillies have work to do to keep the division lead.

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Bryce Harper hits 100th home run at Citizens Bank Park

On Saturday, the Phillies first baseman blasted his 24th home run of the season and 100th at Citizens Bank Park. Harper joined Phillies legends Ryan Howard (198) and Chase Utley (129) as the only players to hit 100 home runs at Phillies Ballpark.

He also became the 13th player in MLB history to smash 100 home runs in two different venues. He has hit 100 home runs at Nationals Park. 92 of those came while he was with the Nats and eight after he signed with the Phillies. Only 12 other MLB players have achieved the feat.

It was Bryce Harper's 330th dinger.

This season, Bryce Harper is among the NL MVP candidates, along with Shohei Ohtani and Francisco Lindor. Ohtani has the numbers on his side, but is only playing as a DH.