He currently plays for SD Laredo, wearing the number 8 shirt. He plays primarily as a Midfield. His current market value is estimated at 25K €.

His most recent move was a from UD Sámano to SD Laredo on 2022-07-01.

Across 11 appearances in the Spanish Tercera División RFEF 2025-2026, Jon Sanmillán registered 0 goals and 0 assists, while completing 0 key passes out of 0 total passes with a passing accuracy of -.