Plumlee was also a member of the United States national team that won a gold medal in the 2014 FIBA Basketball World Cup.

For the season, he averaged 7.5 points, 8 rebounds, and 1.5 blocks per game to help man the paint for the defending champion Blue Devils.

[17] On November 15, 2013, in his first game against his brother Miles and the Phoenix Suns, he recorded 7 points, 3 rebounds and 2 assists in a 100–98 overtime win.

[18] The following night, Plumlee played 26 minutes against the Los Angeles Clippers with both Brook Lopez and Kevin Garnett out injured, and had 19 points and 6 rebounds, both career highs.

[21] On April 8, 2014, the Nets faced the two-time defending champion Miami Heat, looking to become the first team to sweep LeBron James in a four-game season series.

[22] With Kevin Garnett resting his back and Andray Blatche out with illness, Plumlee was the only active center on the Nets roster.

The Nets held an 88–87 lead in the closing seconds when James attempted a dunk that would have won the game for the Heat.

Plumlee blocked the shot and secured the season sweep in what the New York Times described as a signature moment in his career.

[23] Although James was visibly upset about the play, and claimed that he had been fouled, the NBA later announced that the call was correct and that the block was clean.

[37] In Game 3 of the Trail Blazers' 2016 first-round playoff series against the Los Angeles Clippers, Plumlee recorded career highs of 21 rebounds and nine assists in a 96–88 win.

[40] On January 8, 2017, Plumlee recorded eight points, a career-high 12 assists, 10 rebounds, three blocks and one steal across 40 minutes in a 125–124 double-overtime loss to the Detroit Pistons.

The Nuggets would go on to reach the Western Conference Finals after becoming the first team to overcome multiple 3–1 series deficits in a single postseason, doing so against the Utah Jazz and Los Angeles Clippers in the First Round and Semi-Finals respectively, before Denver would end up losing to the eventual NBA champion Los Angeles Lakers in five games.

[50] Plumlee made his Hornets debut on October 20, recording eight points, ten rebounds and five assists in a 123–122 win over the Indiana Pacers.

[51] On December 27, he scored a season-high 15 points, alongside nine rebounds, three assists, two steals and three blocks, in a 123–99 win over the Houston Rockets.

[52] On January 21, 2023, Plumlee scored a season-high 25 points, alongside eleven rebounds and two assists, in a 122–118 win over the Atlanta Hawks.

[53] During Plumlee's 2022–23 season with the Hornets as their starting center for the second straight year, he was averaging career highs in points (12.2) and rebounds (9.7) per game.

[54] On February 9, 2023, Plumlee was traded to the Los Angeles Clippers in exchange for Reggie Jackson and a future second-round pick.

Plumlee made his Clippers debut on February 14, recording eight points, five rebounds and three assists, in a 134–124 win over the Golden State Warriors.

[59] Plumlee was a member of the United States national team that won the gold medal in the 2014 FIBA Basketball World Cup.

You can't see the supernatural and what God has planned.”[66] Mason tends to spend the offseason shuttling between his family home in Indiana, and New York City, where he bunks with best friend Ked Fisseha.