[5] The club completed its inaugural season by leading the league in attendance while qualifying for the last playoff spot in the western conference, although they fell in the play-in round to the Sacramento Republic.

Fullback Ethen Sampson and midfielders Ken Akamatsu, Tommy Madden, and Toni Soler left the club at the expiration of their contracts after the 2019 season.

[7] In November, the club announced that they had signed new contracts with two additional inaugural season players, midfielder Daniel Bruce[8] and defender Manny Padilla.

[13] On January 29, New Mexico United drew USL League One opponent Greenville Triumph SC in the Second Round of the U.S. Open Cup, to be played April 7.

[14] The club announced the signing of midfielder Andrew Tinari on February 7, the day before a scheduled preseason friendly against Colorado Springs Switchbacks.

[16] On February 12, 2019, top scorer Kevaughn Frater completed a move to Indian Super League club Bengaluru FC on a short-term contract.

[17] The next day, French midfielder Joris Ahlinvi became the final preseason addition to the squad, after not signing with FC Cincinnati as 53rd overall pick in the 2020 MLS SuperDraft.

[19] Also during February, New Mexico state legislators approved a $4.1 million capital outlay to fund feasibility and design studies for a potential soccer-specific stadium in the city of Albuquerque.

[28] On July 2, the revised schedule was finalized to include inter-group matches against OKC Energy, Phoenix Rising, and Rio Grande Valley FC Toros.

Goalkeeper Ben Beaury left on a season-long loan to Reno 1868 on July 6, leaving Philipp Beigl as second-choice behind Cody Mizell.

[49]In the preparations for the resumption of league play following the shutdown prompted by the coronavirus pandemic, the remainder of United's schedule was announced on July 2.