Mullins' milestone home run came during the bottom of the fourth inning against starting pitcher Antonio Senzatela, making it his 14th on the season.
The former All-Star and Silver Slugger also made an incredible catch during the top half of the third prior to hitting his career milestone one inning later - proving to everyone that Mullins should have a Gold Glove award by now.
After a hot start to the season, Mullins has been having trouble bouncing back, as he now brings his slashline up to .217/.295/.407 on the year (87 games) with 45 RBI and 14 stolen bases following the home run.
The former 13th-round pick of the 2015 MLB Draft has spent all eight years in Baltimore and has become a hot topic as this year's MLB trade deadline approaches on July 31st.
Mullins is currently under a one-year deal worth $8.725 million and is set to be an unrestricted free agent when the season ends.