He played college football for the Baylor Bears, where he won twice the Ray Guy Award and earned All-American honors.

Sepulveda was a fourth-string punter at Highland Park behind Ryan Wolcott (the kicker), Jason Wood (the backup), and Trey Warren (the starter).

[2] After the release of former starter Chris Gardocki, Sepulveda successfully bested Mike Barr for the starting job.

In the first quarter of a December 20 game against the St. Louis Rams, in his rookie season, Sepulveda completed a 32-yard pass to running back Najeh Davenport on a fake punt play.

[14] In 2023, he joined as an attorney the brand new, Dallas-based law firm Campbell Miller Payne as a charter member.