BYU has had many talented defensive linemen throughout its history, but here are five that are considered among the greatest to ever play at the school:

1.Jason Buck: Buck was one of the most dominant and decorated defensive linemen in BYU history, earning All-American honors in 1986. He was also the recipient of the Outland Trophy, given to the best interior lineman in college football.

2.Jan Jorgensen: Jorgensen was one of the most productive and disruptive defensive linemen in BYU history. He finished his college career with 24.5 sacks and 44 tackles for loss, earning All-Mountain West honors in 2009.

3.Merlin Olsen: Olsen was one of the most talented and productive defensive linemen in BYU history, earning All-American honors in 1961. He went on to have a Hall of Fame career in the NFL.

4.Eathyn Manumaleuna: Eathyn Manumaleuna was one of the most talented and productive defensive linemen in BYU history, earning All-Independent honors in 2013. He finished his college career with 11.5 sacks and 23 tackles for loss.

5.Kai Nacua: Nacua was one of the most talented and productive defensive linemen in BYU history, earning All-Independent honors in 2016. He finished his college career with 12 interceptions and 5 sacks.

It's important to note that this list is not exhaustive and there may be other defensive linemen that could be considered depending on how one measures "greatest".