Kallman formerly played for Minnesota United when the team competed in the North American Soccer League and MLS.

[2] He played for Minnesota United, splitting time between the reserves and full team until the 2016 season when he became a mainstay of the back line.

On August 15, 2020, Kallman moved on loan to USL Championship side El Paso Locomotive.

[3] Kallman signed with Major League Soccer club Nashville SC on February 13, 2024.

His best live cash is $62,110 on November 23, 2018, at the $3,500 WPT Seminole Rock N Roll Poker Open Main Event.