(someone correct me if I'm wrong)
I think the line is Humphries-Iupati-Cole-Pugh-Smith. The "if healthy" part is key.
Cole is a rookie. Drafted in 3rd round.
Humphries, Iupati, Pugh, and Smith haven't exactly been the most durable of guys the last two or so seasons. Humphries had knee surgery last year. Iupati had elbow surgery. Pugh missed time last year with a back injury. Smith tore his triceps in 2016. Humphries has played 18 of 32 games the last two years. Iupati has played 16 of 32 games the last two years (although outside of last year, the least he's played in his career is 12 games). Pugh has played in 19 of 32 games the last two years. Smith has played in 17 of 32 games the last two years. Pugh played last year at T, but will be a G this year.
ARI also brought in a new offensive line coach, Ray Brown. This piece speaks highly of that addition.