Seigle starred for his high school basketball team, Carbondale Area Chargers leading them to winning 59 consecutive games and a state title.

[2] In 2000, Seigle continued to spark big numbers for San Miguel and led the team in regaining the Commissioner's and Governor's Cup titles.

In his fourth season with the league, Seigle joined the RP National Training Pool, as preparation for the 2002 Asian Games in Busan, South Korea.

However, during a pre-Asian Games match against Qatar on September 22, 2002, Seigle suffered a torn right Achilles tendon after taking a shot.

The Philippine Cup put Seigle in the headlines as he scored at least 20+ points in 19 straight times during the conference breaking Alvin Patrimonio's previous record.

It also helped San Miguel gain an outright semifinals berth while earning him the Best Player of the Conference Award, his second since 1999.

[4] In the 2010–2011 season, after playing many successful years for San Miguel Beermen, Seigle was traded to the Air21 Express along with Paul Artadi, Dorian Peña and Dondon Hontiveros.

Seigle has declined an offer from Barako Bull for a contract extension as he expressed his desire to explore other options, less than two weeks before the start of the PBA's 39th season.

He won his 8th and last championship with the Tropang Texters after they defeated the Rain or Shine Elasto Painters in seven games during the 2015 Commissioner's Cup.