Nathan Adrian finished first in 48.74 in the men’s 100m freestyle final at the 2021 TYR Pro Series at Mission Viejo. The win gave him his 41st career win in TYR Pro Swim Series competitions dating back to 2010 and saw him become the second fastest American this season. Eric Friese (49.05) and Zheng Quah (49.30) finished second and third respectively.