Coming out of Gonzaga, where he won WCC Player of the Year, Pangos went undrafted in the 2015 NBA Draft. He spent the last six years playing professionally in Europe, most recently for Zenit Saint Petersburg of the VTB United League and the EuroLeague.
Last season in EuroLeague play, the 6-2 guard earned All-EuroLeague First Team honors after averaging a career-high 13.5 points, 2.1 rebounds, and 6.7 assists.
The 28-year-old shot .390 from beyond the arc and made the most three-pointers (89) in EuroLeague play while ranking third in assists per game and 18th in points per game.
With Cleveland, Pangos will probably be the third point guard behind Ricky Rubio and Darius Garland.