[2] With a record of 19-1-1, Karpency made his overseas debut against Karo Murat in Germany for the WBO Inter-Continental Light Heavyweight title on May 1, 2010.
Two years later in February 2012, Karpency again went overseas to Cardiff, Wales, challenging Nathan Cleverly for the WBO light heavyweight title.
In a significant upset, Karpency won via split decision, picking up the biggest win of his career to date, and moved to 24-4-1.
A year later in 2016, Karpency made his return, getting a knockout win on the regional circuit before facing Oleksander Gvozdyk for the NABF light heavyweight title.
In 2024, Karpency was a late replacement for a fight with David Nyika, an Olympic bronze medallist who had a 9-0 pro record at the time, and nearly a decade younger.
"The Bullfrog" Jeremiah, age 28, fights in the heavyweight division (holding a record of 15-2-1) while Dan competes as a super welterweight and is 8–2.