Dean Harrington is a linebacker for San Diego State, standing 6'2" and weighing 227 pounds. The Thousand Oaks, California native redshirted during his first season in 2024. In 2025, his redshirt freshman year, Harrington appeared in all 13 games on defense and special teams, making his collegiate debut against Stony Brook on August 28. He recorded three total tackles during the season, including solo stops against Washington State on September 6, Northern Illinois on September 27, and Boise State on November 15. Harrington enters the 2026 season as a returning player for the Aztecs.