[3][4] Glendale, Arizona played host to Round 2 one week later where Ken Roczen led the 450cc Main Event early until Malcolm Stewart had a crash, bringing out the red flag.

After the restart, the lead changed hands twice, from Roczen to defending champion Jason Anderson and then to Blake Baggett, who took his first career 450cc Main Event win.

[12] Heavy rain before the fifth race at San Diego led to a track that was “a miserable mess of standing water and deep mud for the racers, and just completing a lap without falling or getting stuck was an accomplishment in itself[14]”.

[17][18] The 450cc Main Event in Arlington was particularly memorable as it featured a last-corner pass for the win and the closest finish in Supercross history with Webb edging Ken Roczen to the line by 0.028 seconds.

[19][17][20] Detroit played host to the second Triple Crown race of the 2019 season, with Eli Tomac winning the 450cc event with finishes of 1st, 1st and 6th.

While Austin Forkner didn’t win the 250cc Main Event, he remained undefeated in the 250cc Eastern Regional division, beating all of the other East class competitors.

[29] Round 11 saw Marvin Musquin take his first win of 2019 in Indianapolis in the 450cc Main Event, ending an 11-month dry spell, while Austin Forkner won again in the 250cc Eastern Regional class.

[38][35] Eli Tomac was the winner of Round 14 of the 450cc season in Nashville, while Martin Davalos won the 250cc Eastern Regional class Main Event, his first win in three years.

[39] Colorado native Tomac went on to win the next event at his home race in Denver, much to the approval of the crowd, and narrowing the points gap to the championship leader Cooper Webb.

[40][41] The championship battle in the 250cc Western Regional class opened back up a bit though, with Adam Cianciarulo returning to the top step of the podium and extending his points lead over Dylan Ferrandis.