Buck has aged almost the exact same amount from Halo 3 ODST to Halo 5 as Nathan Fillion did! Halo 3 ODST took place on October 20, 2552, and came out September 22, 2009. Halo 5 took place beginning on October 23, 2558 and came out October 27, 2015. The time difference in game and in real life are almost identical.
Yeah, that’s pretty uncanny. I wonder if that was intentional… nah, I’ll chalk it up to a coincidence.