However, he saw limited playing time due to his short stature until after a growth spurt in his junior year where he began to develop more as a player.

[2] While in his senior year at Eden Prairie High School, Seeler committed to play NCAA Division 1 hockey for the University of Nebraska Omaha.

[5] He stated that he felt going through the USHL before joining the collegiate league would be the best way to prepare for the jump from junior hockey to college.

[14] After his first NHL fight against Luke Witkowski on March 4, 2018, Seeler missed three games due to a bicep strain.

[23] After attending the Blackhawks training camp for the delayed 2020–21 season, Seeler failed to make the opening night roster and was reassigned to AHL affiliate, the Rockford IceHogs.

[26] He endeared himself to Flyers fans and teammates during the team's first match against the Seattle Kraken when he fought 6 feet 7 inches (2.01 m) Jamie Oleksiak to a standstill.

[27] However, as the Flyers held a 13–20–8 record by January 2022 and became riddled with injuries, Seeler was asked to move into a fourth-line winger position.

[28] On May 20, 2022, Seeler opted to forgo free agency and agreed to a two-year, $1.550 million contract extension with the Flyers.