He has previously played in MLB for the New York Mets, Los Angeles Dodgers, Tampa Bay Rays, and Atlanta Braves.

[1][2][3] He was born into a musical family: his mother Marita ran an after-school performing-arts center in Long Beach, while his father played trumpet, piano, and trombone.

[6] As children, d'Arnaud and his older brother Chase would discuss "how cool that would be if we played with each other or against each other in the big leagues".

[8] D'Arnaud began to draw the attention of scouts as a high school baseball player in 2007, and was invited to work out with the Toronto Blue Jays.

[10] D'Arnaud had committed to play college baseball for the Pepperdine Waves of Pepperdine University after high school, the same school for which his brother played,[11] but was selected by the Philadelphia Phillies in the supplemental first round of the 2007 Major League Baseball draft, the 37th overall pick.

[16] To begin 2010, d'Arnaud was sent from the Phillies to the Toronto Blue Jays organization in a ten player trade.

Toronto received d'Arnaud, Kyle Drabek, and Michael Taylor, who they later flipped to the Oakland Athletics for Brett Wallace.

Despite suffering from back problems and playing in a higher league, d'Arnaud put up comparable numbers to his 2009 campaign, hitting .259, an OPS of .726 and six home runs in 71 games.

[20][21] In 2011, d'Arnaud played the entire 2011 season in the Eastern League, with the Blue Jays Double-A affiliate, the New Hampshire Fisher Cats.

[25] The next day, d'Arnaud went on to win his second minor league championship ring, as the New Hampshire Fisher Cats defeated the Reading Phillies 3 games to 1 in the semi-finals and then defeated the Richmond Flying Squirrels 3 games to 1 in the final series of the Eastern League championship.

[28] D'Arnaud was also named the starting catcher for the Double-A level in Baseball America's honorary "classifications" All-Star team.

[31] On December 17, 2012, the Blue Jays traded d'Arnaud, Noah Syndergaard, John Buck, and Wuilmer Becerra to the New York Mets for R. A. Dickey, Josh Thole, and Mike Nickeas.

The Mets called up d'Arnaud for the first time on August 17, when John Buck was placed on the paternity list.

[37] In his first major league plate appearance, d'Arnaud drew a four-pitch walk from San Diego starter Edinson Vólquez.

[37] D'Arnaud got his first major league hit on August 20 against Atlanta Braves pitcher Luis Ayala in the 8th inning.

[38] He hit his first Major League home run on August 25, a two-run shot off Detroit Tigers pitcher Rick Porcello.

On June 24, d'Arnaud was called back up to the Mets and resumed his role as starting catcher, after Teagarden was placed on the disabled list with a left hamstring strain.

[49] D'Arnaud, who had a two-run single and a solo homer, was hurt trying to tag A. J. Pierzynski, who was trying to score on a sacrifice fly to left.

Michael Cuddyer's throw was up the third-base line, and Pierzynski collided with d'Arnaud, who couldn't hold on to the ball.

After a rehab stint with the St. Lucie Mets and Las Vegas 51s, d'Arnaud was reactivated in June and Plawecki was sent down, with Rivera staying as the backup.

[54] On August 16, following injuries to José Reyes and Wilmer Flores, the Mets started d'Arnaud at third base.

Terry Collins chose to move d'Arnaud back and forth between third and second base, swapping him with Asdrúbal Cabrera twelve times, in order to minimize his impact on the defense.

On April 11, d'Arnaud was placed on the 10-day disabled list due to a partial tear of the UCL in his right elbow.

[62] On July 21, d'Arnaud hit his first career grand slam off of Dylan Cease leading the team to a 4–2 win against the Chicago White Sox.

[67] On May 2, d'Arnaud was placed on the 60-day injured list (IL) with a torn a thumb ligament that required surgery.

[76] In 2022, d'Arnaud was named to the 2022 Major League Baseball All-Star Game roster as a reserve catcher.

[79][80] On April 8, 2023, d'Arnaud and San Diego Padres infielder Rougned Odor collided at home plate.

[81] The collision resulted in d'Arnaud's placement on the 7-day injured list,[82] and the promotion of Chadwick Tromp to the major league roster.

[86][87] On April 19, 2024, d'Arnaud hit three home runs, including one grand slam, in a win against the Texas Rangers.